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The Perfect High Priest
12For when by reason of the time ye ought to be teachers, ye have need again that some one teach you the rudiments of the first principles of the oracles of God; and are become such as have need of milk, and not of solid food. 13For every one that partaketh of milk is without experience of the word of righteousness; for he is a babe. 14But solid food is for fullgrown men, [even] those who by reason of use have their senses exercised to discern good and evil.
Hebrews 5:12-14 (ASV)