Hebrews 5:12; Hebrews 5:14

Hebrews 5:12

12 For when for the time ye ought to be teachers, ye have need that one teach you again which be the first principles of the oracles of God; and are become such as have need of milk, and not of strong meat.

Hebrews 5:14

14 But strong meat belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil.