Adam Clarke on 1 Corinthians 3:1

I, brethren, could not speak unto you as unto spiritual - This is a continuation of the preceding discourse. See the notes on 1Cor 2:14, 1Cor 2:15 (note), and 1Cor 2:16 (note).

But as unto carnal - Σαρκικοις, Persons under the influence of fleshly appetites; coveting and living for the things of this life.

Babes in Christ - Just beginning to acquire some notion of the Christian religion, hut as yet very incapable of judging what is most suitable to yourselves, and consequently utterly unqualified to discern between one teacher and another; so that your making the distinctions which you do make, so far from being a proof of mature judgment, is on the contrary a proof that you have no right judgment at all; and this springs from your want of knowledge in Divine things.