1 Corinthians 13:11 When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things.

The analogy of growing up from a child to a man is a process of transformation from immaturity to maturity. A grown up man will no longer do the childish things. The childish temper and ways are put away. He puts on a frame of maturation that comes with years of learning and training by his parents and teachers and mentors that come in life. It is a fitting description of the spiritual man growing to maturity.