CCC 473 But at the same time, this truly human knowledge of God’s Son expressed the divine life of his person.1 “The human nature of God’s Son, not by itself but by its union with the Word, knew and showed forth in itself everything that pertains to God.”2 Such is first of all the case with the intimate and immediate knowledge that the Son of God made man has of his Father.3 The Son in his human knowledge also showed the divine penetration he had into the secret thoughts of human hearts.4

1 Cf. St. Gregory the Great, “Sicut aqua” ad Eulogium, Epist. Lib. 10, 39 PL 77, 1097 Aff.; DS 475.
2 St. Maximus the Confessor, Qu. et dub. 66 PG 90, 840A.
3 Cf. Mk 14:36; Mt 11:27; Jn 1:18; 8:55; etc.
4 Cf. Mk 2:8; Jn 2 25; 6:61; etc.