Expositor's Bible Commentary Commentary 1 Corinthians 3:2

"I fed you with milk, not with meat; for ye were not yet able [to bear it]: nay, not even now are ye able;" — 1 Corinthians 3:2 (ASV)

Paul now amplifies the reference in v.1 to infants by explaining that when he first came, he fed the Corinthian Christians spiritual milk—i.e., the elementary salvation truths of the Gospel. He could not teach them deeper doctrines (“solid food”) because they could not spiritually digest them. And their immaturity is continuing.