Irenaeus was an early church father. The apostle John discipled Polycarp. And Polycarp discipled Irenaeus. Here (written about 180 AD) he speaks against what would later become aspects of Calvinist Theology in its denial of the free will. The source can be found at the link provided. This page is a quote of the following two sections of his work:
Chapter XXXVII.-Men are Possessed of Free Will, and Endowed with the Faculty of Making a Choice. It is Not True, Therefore, that Some are by Nature Good, and Others Bad.
Chapter XXXIX.-Man is Endowed with the Faculty of Distinguishing Good and Evil; So That, Without Compulsion, He Has the Power, by His Own Will and Choice, to Perform God's Commandments, by Doing Which He Avoids the Evils Prepared for the Rebellious.
Another early church father, Ignatius, also makes this statement: "If any one is truly religious, he is a man of God; but if he is irreligious, he is a man of the devil, made such, not by nature, but by his own choice."
Also Justin Martyr a 2nd Century Christian apologist
CHAP. CXLI.--FREE-WILL IN MEN AND ANGELS.
"But that you may not have a pretext for saying that Christ must have been crucified, and that those who transgressed must have been among your nation, and that the matter could not have been otherwise, I said briefly by anticipation, that God, wishing men and angels to follow His will, resolved to create them free to do righteousness; possessing reason, that they may know by whom they are created, and through whom they, not existing formerly, do now exist; and with a law that they should be judged by Him, if they do anything contrary to right reason: and of ourselves we, men and angels, shall be convicted of having acted sinfully, unless we repent beforehand. But if the word of God foretells that some angels and men shall be certainly punished, it did so because it foreknew that they would be unchangeably [wicked], but not because God had created them so."
2. But if some had been made by nature bad, and others good, these latter would not be deserving of praise for being good, for such were they created; nor would the former be reprehensible, for thus they were made [originally]. But since all men are of the same nature, able both to hold fast and to do what is good; and, on the other hand, having also the power to cast it from them and not to do it,-some do justly receive praise even among men who are under the control of good laws (and much more from God), and obtain deserved testimony of their choice of good in general, and of persevering therein; but the others are blamed, and receive a just condemnation, because of their rejection of what is fair and good. And therefore the prophets used to exhort men to what was good, to act justly and to work righteousness, as I have so largely demonstrated, because it is in our power so to do, and because by excessive negligence we might become forgetful, and thus stand in need of that good counsel which the good God has given us to know by means of the prophets.
3. For this reason the Lord also said, "Let your light so shine before men, that they may see your good deeds, and glorify your Father who is in heaven."599 And, "Take heed to yourselves, lest perchance your hearts be overcharged with surfeiting, and drunkenness, and worldly cares."600 And, "Let your loins be girded about, and your lamps burning, and ye like unto men that wait for their Lord, when He returns from the wedding, that when He cometh and knocketh, they may open to Him. Blessed is that servant whom his Lord, when He cometh, shall find so doing."601 And again, "The servant who knows his Lord's will, and does it not, shall be beaten with many stripes."602 And, "Why call ye me, Lord, Lord, and do not the things which I say? "603 And again, "But if the servant say in his heart, The Lord delayeth, and begin to beat his fellow-servants, and to eat, and drink, and to be drunken, his Lord will come in a day on which he does not expect Him, and shall cut him in sunder, and appoint his portion with the hypocrites."604 All such passages demonstrate the independent will605 of man, and at the same time the counsel which God conveys to him, by which He exhorts us to submit ourselves to Him, and seeks to turn us away from [the sin of] unbelief against Him, without, however, in any way coercing us.
4. No doubt, if any one is unwilling to follow the Gospel itself, it is in his power [to reject it], but it is not expedient. For it is in man's power to disobey God, and to forfeit what is good; but [such conduct] brings no small amount of injury and mischief. And on this account Paul says, "All things are lawful to me, but all things are not expedient; "606 referring both to the liberty of man, in which respect "all things are lawful," God exercising no compulsion in regard to him; and [by the expression] "not expedient" pointing out that we "should not use our liberty as a cloak of maliciousness,607 for this is not expedient. And again he says, "Speak ye every man truth with his neighbour."608 And, "Let no corrupt communication proceed out of your mouth, neither filthiness, nor foolish talking, nor scurrility, which are not convenient, but rather giving of thanks."609 And, "For ye were sometimes darkness, but now are ye light in the Lord; walk honestly as children of the light, not in rioting and drunkenness, not in chambering and wantonness, not in anger and jealousy. And such were some of you; but ye have been washed, but ye have been sanctified in the name of our Lord."610 If then it were not in our power to do or not to do these things, what reason had the apostle, and much more the Lord Himself, to give us counsel to do some things, and to abstain from others? But because man is possessed of free will from the beginning, and God is possessed of free will, in whose likeness man was created, advice is always given to him to keep fast the good, which thing is done by means of obedience to God.
5. And not merely in works, but also in faith, has God preserved the will of man free and under his own control, saying, "According to thy faith be it unto thee; "611 thus showing that there is a faith specially belonging to man, since he has an opinion specially his own. And again, "All things are possible to him that believeth; "612 and, "Go thy way; and as thou hast believed, so be it done unto thee."613 Now all such expressions demonstrate that man is in his own power with respect to faith. And for this reason, "he that believeth in Him has eternal life while he who believeth not the Son hath not eternal life, but the wrath of God shall remain upon him."614 In the same manner therefore the Lord, both showing His own goodness, and indicating that man is in his own free will and his own power, said to Jerusalem, "How often have I wished to gather thy children together, as a hen [gathereth] her chickens under her wings, and ye would not! Wherefore your house shall be left unto you desolate."615
6. Those, again, who maintain the opposite to these [`conclusions], do themselves present the Lord as destitute of power, as if, forsooth, He were unable to accomplish what He willed; or, on the other hand, as being ignorant that they were by nature "material," as these men express it, and such as cannot receive His immortality. "But He should not," say they, "have created angels of such a nature that they were capable of transgression, nor men who immediately proved ungrateful towards Him; for they were made rational beings, endowed with the power of examining and judging, and were not [formed] as things irrational or of a [merely] animal nature, which can do nothing of their own will, but are drawn by necessity and compulsion to what is good, in which things there is one mind and one usage, working mechanically in one groove (inflexibiles et sine judicio), who are incapable of being anything else except just what they had been created." But upon this supposition, neither would what is good be grateful to them, nor communion with God be precious, nor would the good be very much to be sought after, which would present itself without their own proper endeavour, care, or study, but would be implanted of its own accord and without their concern. Thus it would come to pass, that their being good would be of no consequence, because they were so by nature rather than by will, and are possessors of good spontaneously, not by choice; and for this reason they would not understand this fact, that good is a comely thing, nor would they take pleasure in it. For how can those who are ignorant of good enjoy it? Or what credit is it to those who have not aimed at it? And what crown is it to those who have not followed in pursuit of it, like those victorious in the contest?
7. On this account, too, did the Lord assert that the kingdom of heaven was the portion of "the violent; "and He says, "The violent take it by force; "616 that is, those who by strength and earnest striving axe on the watch to snatch it away on the moment. On this account also Paul the Apostle says to the Corinthians, "Know ye not, that they who run in a racecourse, do all indeed run, but one receiveth the prize? So run, that ye may obtain. Every one also who engages in the contest is temperate in all things: now these men [do it] that they may obtain a corruptible crown, but we an incorruptible. But I so run, not as uncertainty; I fight, not as One beating the air; but I make my body livid, and bring it into subjection, lest by any means, when preaching to others, I may myself be rendered a castaway."617 This able wrestler, therefore, exhorts us to the struggle for immortality, that we may be crowned, and may deem the crown precious, namely, that which is acquired by our struggle, but which does not encircle us of its own accord (sed non ultro coalitam). And the harder we strive, so much is it the more valuable; while so much the more valuable it is, so much the more should we esteem it. And indeed those things axe not esteemed so highly which come spontaneously, as those which are reached by much anxious care. Since, then, this power has been conferred upon us, both the Lord has taught and the apostle has enjoined us the more to love God, that we may reach this [prize] for ourselves by striving after it. For otherwise, no doubt, this our good would be [virtually] irrational, because not the result of trial. Moreover, the faculty of seeing would not appear to be so desirable, unless we had known what a loss it were to be devoid of sight; and health, too, is rendered all the more estimable by an acquaintance with disease; light, also, by contrasting it with darkness; and life with death. Just in the same way is the heavenly kingdom honourable to those who have known the earthly one. But in proportion as it is more honourable, so much the more do we prize it; and if we have prized it more, we shall be the more glorious in the presence of God. The Lord has therefore endured all these things on our behalf, in order that we, having been instructed by means of them all, may be in all respects circumspect for the time to come, and that, having been rationally taught to love God, we may continue in His perfect love: for God has displayed long-suffering in the case of man's apostasy; while man has been instructed by means of it, as also the prophet says, "Thine own apostasy shall heal thee; "618 God thus determining all things beforehand for the bringing of man to perfection, for his edification, and for the revelation of His dispensations, that goodness may both be made apparent, and righteousness perfected, and that the Church may be fashioned after the image of His Son, and that man may finally be brought to maturity at some future time, becoming ripe through such privileges to see and comprehend God.619
2. How, then, shall he be a God, who has not as yet been made a man? Or how can he be perfect who was but lately created? How, again, can he be immortal, who in his mortal nature did not obey his Maker? For it must be that thou, at the outset, shouldest hold the rank of a man, and then afterwards partake of the glory of God. For thou dost not make God, but God thee. If, then, thou art God's workmanship, await the hand of thy Maker which creates everything in due time; in due time as far as thou art concerned, whose creation is being carried out.624 Offer to Him thy heart in a soft and tractable state, and preserve the form in which the Creator has fashioned thee, having moisture in thyself, lest, by becoming hardened, thou lose the impressions of His fingers. But by preserving the framework thou shalt ascend to that which is perfect, for the moist clay which is in thee is hidden [there] by the workmanship of God. His hand fashioned thy substance; He will cover thee over [too] within and without with pure gold and silver, and He will adorn thee to such a degree, that even "the King Himself shall have pleasure in thy beauty."625 But if thou, being obstinately hardened, dost reject the operation of His skill, and show thyself ungrateful towards Him, because thou weft created a [mere] man, by becoming thus ungrateful to God, thou hast at once lost both His workmanship and life. For creation is an attribute of the goodness of God but to be created is that of human nature. If then, thou shalt deliver up to Him what is thine that is, faith towards Him and subjection, thou shalt receive His handiwork, and shall be a perfect work of God.
3. If, however, thou wilt not believe in Him, and wilt flee from His hands, the cause of imperfection shall be in thee who didst not obey, but not in Him who called [thee]. For He commissioned [messengers] to call people to the marriage, but they who did not obey Him deprived themselves of the royal supper.626 The skill of God, therefore, is not defective, for He has power of the stones to raise up children to Abraham;627 but the man who does not obtain it is the cause to himself of his own imperfection. Nor, [in like manner], does the light fail because of those who have blinded themselves; but while it remains the same as ever, those who are [thus] blinded are involved in darkness through. their own fault. The light does never enslave any one by necessity; nor, again, does God exercise compulsion upon any one unwilling to accept the exercise of His skill. Those persons, therefore, who have apostatized from the light given by the Father, and transgressed the law of liberty, have done so through their own fault, since they have been created free agents, and possessed of power over themselves.
4. But God, foreknowing all things, prepared fit habitations for both, kindly conferring that light which they desire on those who seek after the light of incorruption, and resort to it; but for the despisers and mockers who avoid and turn themselves away from this light, and who do, as it were, blind themselves, He has prepared darkness suitable to persons who oppose the light, and He has inflicted an appropriate punishment upon those who try to avoid being subject to Him. Submission to God is eternal rest, so that they who shun the light have a place worthy of their flight; and those who fly from eternal rest, have a habitation in accordance with their fleeing. Now, since all good things are with God, they who by their own determination fly from God, do defraud themselves of all good things; and having been [thus] defrauded of all good things with respect to God, they shall consequently fall under the just judgment of God. For those persons who shun rest shall justly incur punishment, and those who avoid the light shall justly dwell in darkness. For as in the case of this temporal light, those who shun it do deliver themselves over to darkness, so that they do themselves become the cause to themselves that they are destitute of light, and do inhabit darkness; and, as I have already observed, the light is not the cause of such an [unhappy.] condition of existence to them; so those who fly from the eternal light of God, which contains in itself all good things, are themselves the cause to themselves of their inhabiting eternal darkness, destitute of all good things, having become to themselves the cause of [their consignment to] an abode of that