About this we have much to say, and it is hard to explain, since you have become dull of hearing.
Sluggish (slow) hearing
Dull vs Diligent
Have you tuned Jesus out?
Am I slowing or growing?
For though by this time you ought to be teachers, you need someone to teach you again the basic principles of the oracles of God. You need milk, not solid food, for everyone who lives on milk is unskilled in the word of righteousness, since he is a child. But solid food is for the mature, for those who have their powers of discernment trained by constant practice to distinguish good from evil.
Childlike faith vs Childish faith
Spiritual maturity comes from the word being taught and life being caught.