Matthew 18:2-4

Mace(i) 2 and Jesus called a child to him, set him in the midst of them, 3 and said, I declare to you, except ye lay aside your ambition, and become as children, ye shall not enter into the kingdom of the Messias. 4 he therefore who shall become as void of ambition as this child, he shall be greatest in the kingdom of the Messiah.