Hebrews 5:11-14 - Advanced Teaching Hindered By Immaturity
11 concerning whom we have much discourse and of hard explanation to say, since ye have become dull of hearing, 12 for even owing to be teachers, because of the time, again ye have need that one teach you what are the elements of the beginning of the oracles of God, and ye have become having need of milk, and not of strong food, 13 for every one who is partaking of milk is unskilled in the word of righteousness -- for he is an infant, 14 and of perfect men is the strong food, who because of the use are having the senses exercised, unto the discernment both of good and of evil.