Hebrews 5:11-14 - Advanced Teaching Hindered By Immaturity

¹¹ Concerning whom we have much to discourse, and of difficult interpretation to explain, seeing ye are dull of hearing. ¹² For though ye ought for the time to be teachers of others, ye have again need that some one teach you the leading principles of the oracles of God; and are become as those who need milk, and not solid food. ¹³ For every one who useth milk is inexperienced in the word of righteousness: for he is an infant. ¹⁴ But solid nourishment is proper for grown men, even as many as by habit have their organs of perception exercised for the discernment both of good and evil.