Augustine of Hippo : But when His disciples (who are our apostles) put this question to the all-knowing Christ, they were told: "It is not yours to know the times or the seasons which the Father hath put in His own power." [Acts 1:7] What if Christ, who knows what is expedient for us, knows this knowledge not to be expedient? Through Him I know that it is not ours to know the times which God has placed in His own power; but concerning the origin of souls, I am ignorant whether it is or is not ours to know. If I could be sure that such knowledge is not for us, I should cease not only to dogmatize, but even to inquire. As it is, though the subject is so deep and dark that my fear of becoming a rash teacher is almost greater than my eagerness to learn the truth, I still wish to know it if I can do so. It may be that the knowledge for which the psalmist prays: "Lord, make me to know mine end," [Ps. 39:4] is much more necessary; yet I would that my beginning also might be revealed to me. — Jerome LETTER 144.8, From Augustine to Optatus Bede : It is not for you to know times or seasons which the Father has placed in His own authority. He said this, indicating that the time of that (kingdom) is so secret that it lies within the knowledge of the Father alone. And when He says: It is not for you to know, He shows that He Himself knows, whose are all the things that are the Father's, but it is not expedient for mortals to know, so that always uncertain about the coming of the judge, they may live every day as though they were to be judged on another day. — Commentary on Acts Cyprian : The apostle says: "The day of the Lord shall so come as a thief in the night. When they shall say, Peace and security, then on them shall come sudden destruction." Also in the Acts of the Apostles: "No one can know the times or the seasons which the Father has placed in His own power." — Treatise 12, Third Book, Section 89 Gregory the Dialogist : Now it is very properly that the affliction indeed of blessed Job is told, but the length of time that he was under the affliction is kept back, for we see the tribulation of Holy Church in this life, but know nothing for how long she is here to undergo bruising and delay; and hence it is spoken by the mouth of Truth, "It is not for you to know the times or the seasons which the Father hath put in His own power." Herein then, that the suffering of blessed Job is told us, we are taught what we are made acquainted withal by experience; and herein, that the length of time that he continued in his suffering is withheld, we are taught what it is we must remain ignorant of. — Morals on the Book of Job, Preface John Chrysostom : Since then their minds are elevated, He also speaks to them in a higher strain. For He no longer tells them, "Of that day not even the Son of Man knoweth" (Mark xiii. 32); but He says, It is not for you to know the times or the seasons which the Father hath put in His own power. Ye ask things greater than your capacity, He would say. And yet even now they learned things that were much greater than this. And that you may see that this is strictly the case, look how many things I shall enumerate. What, I pray you, was greater than their having learned what they did learn? Thus, they learned that there is a Son of God, and that God has a Son equal with Himself in dignity; they learned that there will be a resurrection; that when He ascended He sat on the right hand of God; and what is still more stupendous, that Flesh is seated in heaven, and adored by Angels, and that He will come again; they learned what is to take place in the judgment; learned that they shall then sit and judge the twelve tribes of Israel; learned that the Jews would be cast out, and in their stead the Gentiles should come in. For, tell me, which is greater? to learn that a person will reign, or to learn the time when? If the greater be with power, much more the other. — Homily on Acts 2 John Chrysostom : "Which the Father hath put in His own power." And yet He declared the Father's power and His to be one: as in the saying, "For as the Father raiseth up the dead and quickeneth them, even so the Son quickeneth whom He will." (John v. 21.) If where need is to work, Thou actest with the same power as the Father; where it behooves to know, dost Thou not know with the same power? Yet certainly to raise up the dead is much greater than to learn the day. If the greater be with power, much more the other. — Homily on Acts 2 Oecumenius : Everywhere there is a barrier of knowledge separating them from what is to come, not as if they are ignorant, but as if they gain nothing from this knowledge concerning salvation of the soul; therefore he speaks to them vaguely and more generally: "But you will be baptized with the Holy Spirit not many days from now." (Acts 1:5) If you ask, "Why then does the Spirit not descend immediately, or does this not also indicate a delay?" Learn that the Spirit does not come immediately after the ascension, so as to make the reception of it more eagerly desired; not on a definite day, but making them more earnest and more fittingly prepared for the coming. — Commentary on Acts Oecumenius : It must be noted whether this statement brings any importance to those wishing to remove the certain limit or fate of human affairs. For to say, "which the Father appointed to his own authority," abolishes fate. But if the father has placed, it is clear that the son also; for all things that belong to the Father also belong to the Son. — Commentary on Acts