Cross reference
1 Corinthians 13:11
11 When I was a child, I spoke as a child, I felt as a child, I thought as a child. Now that I have become a man, I have put away childish things.
1 Corinthians 14:20
20 Brothers, don't be children in thoughts, yet in malice be babies, but in thoughts be mature.
1 Corinthians 3:1-2
1 Brothers, I couldn't speak to you as to spiritual, but as to fleshly, as to babies in Christ.
2 I fed you with milk, not with meat; for you weren't yet ready. Indeed, not even now are you ready,
Galatians 4:1
1 But I say that so long as the heir is a child, he is no different from a bondservant, though he is lord of all;
Ecclesiastes 11:10
10 Therefore remove sorrow from your heart, And put away evil from your flesh; For youth and the dawn of life are vanity.