Matthew 18:3-7

and said, “Truly I say to you, unless you change and become like children, you will not enter the kingdom of heaven.

So whoever will humble himself like this child, he is the greatest in the kingdom of heaven.

And whoever receives one such child in My name, receives Me;

but whoever causes one of these little ones who believe in Me to sin, it is better for him that a heavy millstone be hung around his neck, and that he be drowned in the depths of the sea. Stumbling Blocks

“Woe to the world because of its stumbling blocks! For it is inevitable that stumbling blocks come; but woe to the person through whom the stumbling block comes!