Hebrews 5:12-14

Murdock(i) 12 For ye ought to be teachers, seeing ye have been long in the doctrine. But now ye need to learn again the first lines of the commencement of the oracles of God: and ye have need of milk, and not of strong food. 13 For every one whose food is milk, is unversed in the language of righteousness, because he is a child. 14 But strong food belongeth to the mature who, being investigators, have trained their faculties to discriminate good and evil.