Hebrews 5

 Being a high priest and an elders quorum president, I can attest to the counsel of Paul - 

"...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.

13 For every one that useth milk is unskilful in the word of righteousness: for he is a babe.

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."  (Hebrews 5:12–14)

All saints are at different levels in their spiritual growth and knowledge.  It never hurts to teach "milk".