Hebrews 5:12-14

RKJNT(i) 12 For though by this time you ought to be teachers, you have need for someone to teach you again the first principles of the oracles of God. You have come to need milk, and not solid food. 13 For everyone who lives on milk is unskilled in the word of righteousness: for he is a babe. 14 But solid food belongs to those who are of full age, those who by practice have their senses trained to discern both good and evil.