Mathew 18:1-4 (KJV)
18 At the same time came the disciples unto Jesus, saying, Who is the greatest in the kingdom of heaven?
2 And Jesus called a little child unto him, and set him in the midst of them,
3 And said, Verily I say unto you, Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven.
4 Whosoever therefore shall humble himself as this little child, the same is greatest in the kingdom of heaven.