Mark 13:32

But how can the Son be ignorant of that last day? Were this the case, we must thence conclude that his nature was imperfect: since he was under the necessity of a second coming, and yet was ignorant when that time should be. But we must remember, that the meaning of this sentence is not, that Christ was really ignorant of this circumstance, but only that it was not then a convenient time to disclose the secret. (St. Augustine) --- Not as if Christ were ignorant himself, as certain Eutychian heretics, called Agnoitæ, held; but because he knew it not as our teacher, to teach it others, as being not expedient. (St. Ambrose, de fide, lib. v. chap. viii.) --- The Son of God is ignorant of this day, not according to his divinity, which sees and knows all things; but according to his humanity, which does not know it of itself, of its own light, but by revelation which is made to it by the divinity, which is intimately united to it. In natura quidem divinitatis novit, says St. Gregory, non ex natura humanitatis. See St. Matthew xxiv. 36.