Hebrews 5:11-14 - Advanced Teaching Hindered By Immaturity
11 of whom we have much to say, and hard to be explained since you are dull of hearing. 12 For indeed because of the time, you ought to be teachers, you have need that one teach you again what are the first principles of the oracles of God. And you have become in need of milk, and not of solid food. 13 For everyone partaking of milk is unskillful in the Word of Righteousness, for he is an infant. 14 But solid food belongs to those who are of full age, even those who because of use have their senses exercised to discern both good and evil.