1 Corinthians 3:1-2

Immaturity and Self-deception

3:1 So, brothers and sisters, I could not speak to you as spiritual people, but instead as people of the flesh, as infants in Christ. 3:2 I fed you milk, not solid food, for you were not yet ready. In fact, you are still not ready,

1 Corinthians 14:20

14:20 Brothers and sisters, do not be children in your thinking. Instead, be infants in evil, but in your thinking be mature.

Ecclesiastes 11:10

11:10 Banish emotional stress from your mind.

and put away pain from your body;

for youth and the prime of life are fleeting.

Galatians 4:1

4:1 Now I mean that the heir, as long as he is a minor, is no different from a slave, though he is the owner of everything.