10 In my opinion, brethren, we have answered the heretics. Let us now answer the astrologers. And how do they attempt to prove that Jesus was under fate? Because, say they, Himself said, “Mine hour is not yet come.” Therefore we believe Him; and if He had said, “I have no hour,” He would have excluded the astrologers: but behold, say they, He said, “Mine hour is not yet come.” If then He had said, “I have no hour,” the astrologers would have been shut out, and would have no ground for their slander; but now that He said, “Mine hour is not yet come,” how can we contradict His own words? 'Tis wonderful that the astrologers, by believing Christ's words, endeavor to convince Christians that Christ lived under an hour of fate.
Well, let them believe Christ when He says, “I have power to lay down my life and to take it up again: no man takes it from me, but I lay it down of myself, and I take it again.” Is this power then under fate? Let them show us a man who has it in his power when to die, how long to live: this they can never do. Let them, therefore, believe God when He says, “I have power to lay down my life, and to take it up again;” and let them inquire why it was said, “Mine hour is not yet come;” and let them not because of these words, be imposing fate on the Maker of heaven, the Creator and Ruler of the stars.
For even if fate were from the stars, the Maker of the stars could not be subject to their destiny. Moreover, not only Christ had not what you call fate, but not even have you, or I, or he there, or any human being whatsoever.
Source: Tractates on the Gospel of John (New Advent)