The bible says every Christian is a baby when they are saved.

 John 4:3,7 1Peter 1:23

God is blessed when He sees His children making the transition from babyhood into adulthood in a spiritual sense.

God wants us to move from the spiritual nursery to the spiritual battlefield.

He wants us to leave the realm of the milk and diapers.

He wants us to enter the realm of meat battle and devotion.   Ephesians 4:13, 1Corinthians 3:1-4, 2Peter 3:18

God want us to grow up.