Matthew 18:1-4

1 In that hour the disciples came to Jesus, saying, "Who then is greatest in the Kingdom of Heaven?"

2 Jesus called a little child to himself, and set him in the midst of them,  3 and said, “Most assuredly I tell you, unless you turn, and become as little children, you will in no way enter into the Kingdom of Heaven.  4 Whoever therefore humbles himself as this little child, the same is the greatest in the Kingdom of Heaven.