2 I fed you with milk, not with solid food, for you were not then able to take it. No, and even now you are not able; you are still worldly.
1 Corinthians 3:2 Cross References - Twentieth_Century
John 16:12
12 I have still much to say to you, but you cannot bear it now.
Hebrews 5:11-14
11 Now on this subject I have much to say, but it is difficult to explain it to you, because you have shown yourselves so slow to learn.
12 For whereas, considering the time that has elapsed, you ought to be teaching others, you still need some one to teach you the very alphabet of the Divine Revelation, and need again to be fed with 'milk' instead of with 'solid food.'
13 For every one who still has to take 'milk' knows nothing of the Teaching of Righteousness; he is a mere infant.
14 But 'solid food' is for Christians of mature faith--those whose faculties have been trained by practice to distinguish right from wrong.
1 Peter 2:2
2 like newly born infants, crave pure spiritual milk, so that you may be enabled by it to grow till you attain Salvation--