58 Seeking to disparage His nature, the heretics lay hold of such sayings as, The Father is greater than I, or, But of that day and hour knows no one, not even the angels in heaven, neither the Son, but the Father only. It is turned to a reproach against the Only-begotten God that He did not know the day and the hour: that, though God, born of God, He is not in the perfection of divine nature, since He is subjected to the limitation of ignorance; that is, an external force stronger than Himself, triumphing, as it were, over His weakness, makes Him captive to this infirmity. And, indeed, it is with an apparent right to claim that this confession is inevitable, that the heretics, in their frenzy, would drive us to such a blasphemous interpretation. The words are those of the Lord Himself, and what, it may be asked, could be more unholy than to corrupt His express assertion by our attempt to explain it away.
Source: On the Trinity (New Advent)