“Train up a child in the way he should go; even when he is old he will not depart from it.”
– Proverbs 22:6 (ESV)

“… Jesus said, ‘Let the little children come to me and do not hinder them, for to such belongs the kingdom of heaven.'”
– Matthew 19:14 (ESV)

“… ‘Truly, I say to you, unless you turn and become like children, you will never enter the kingdom of heaven.’”
– Luke 18:17 (ESV)