The basis for this discussion is in 1 Corinthians 3:
Repeating, in modern language:
Apparently milk is for those who can't chew yet. Does a person ever get past the worldly desires, does a church ever get past jealousy and dissension? That is obviously the expectation. As such, the speaker may need to assess, as Paul did, whether the listeners are spiritual or worldly, and adjust the diet accordingly.