23 Now when he was at Jerusalem, at the pasch, upon the festival day, many believed in his name, seeing his signs which he did. 24 But Jesus did not trust himself unto them, for that he knew all men, 25 And because he needed not that any should give testimony of man: for he knew what was in man.
Chrysostom: To know what is in man’s heart, is in the power of God alone, who fashioned the heart.
Augustine: The Maker knew better what was in His own work, than the work knew what was in itself. Peter knew not what was in himself when he said, I will go with Thee unto death; but our Lord’s answer showed that He knew what was in man; Before the cock crow, thou shalt thrice deny Me. [Luke 22:33, 61]
Bede: An admonition to us not to be confident of ourselves, but ever anxious and mistrustful; knowing that what escapes our own knowledge, cannot escape the eternal Judge.
Scripture from the Douay-Rheims Bible. Commentary from St. Thomas Aquinas, Catena Aurea, Vol. IV (London: Rivington, 1845).