Matthew 18:2-5

He called a little child and set him before them, and said, “I assure you and most solemnly say to you, unless you repent [that is, change your inner self—your old way of thinking, live changed lives] and become like children [trusting, humble, and forgiving], you will never enter the kingdom of heaven. Therefore, whoever humbles himself like this child is greatest in the kingdom of heaven. Whoever receives and welcomes one child like this in My name receives Me