Grace and Understanding

Εἰ πάντες χωρεῖν ἡδύναντο πνευνματικῶς τὰ θεῖα λόγια, οὐχ ἱμείρετο μεταδιδόναι αὐτοῖς τὸ πνευματικὸν χάρισμα· οὐδὲ γάλα αὐτοὺς ἐπότιζειν, εἰ τὴν στερεὰν τροφὴν πάντες μεταλαμβάνειν ἡδυναντο· ἀλλὰ τοῖς ἔτι νηπιάζουσιν περὶ αὐτὸν τὸν τῆς θεογνωσίας λόγον δίκην νηπίων γαλουχουμένων τὸν τῆς κατηχήσεως ἐπιτρέπει δέχεσθαι λόγον. Ἅγιος Ἀθανάσιος, Περὶ Πιστωες Λογος Ὁ Μειζων

If everyone were able to take spiritual delight in the Divine words, He would not wish to give spiritual grace to them. Those who are capable of taking solid food are not given milk to drink, but rather those who are infants in the Divine thoughts of the Word are rightly treated as infants in need of milk, receiving the rudiments appropriate to their reason.   Saint Athanasius, The Greater Sermon on the Reason of Faith