Hebrews 5:11-14 - Advanced Teaching Hindered By Immaturity
11 We have many things to say about him and it is hard to explain it to you, for you are dull of hearing (slow to learn). 12 At this time you should be teachers. But you need someone to teach you again from the beginning the elementary truths from the Word of God. You need milk, not solid food. 13 Everyone who drinks milk is unacquainted with the word of righteousness: for he is a babe. 14 But solid food belongs to mature people. It belongs to those who by reason of use have their senses trained to know the difference between good and evil.