“And whoso shall receive one such little child in my name receiveth me. But whoso shall offend one of these little ones which believe in me, it were better for him that a millstone were hanged about his neck, and that he were drowned in the depth of the sea.” – Matthew 18:5-6
God loves His little children. Both in the physical regard, as well as the spiritual. It is written that God will show mercy on whom He will show mercy (Romans 9:15), but a He will also judge harshly those whom He chooses also. It’s His prerogative to decide where mercy ends and judgment begins. Yet God makes one thing very clear in the opening verses of Mathew chapter 18, that He has little patients and very little mercy for those that hurt His little children. Declaring that it would be better to be weighted down with a millstone, dragged to the cold dark depths of the sea, and drowned. No burial, no mourners, yet still more merciful then His judgment against them because when His most vulnerable are intentionally harmed, He takes it personally.
“And the King shall answer and say unto them, Verily I say unto you, Inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me. Then shall he say also unto them on the left hand, Depart from me, ye cursed, into everlasting fire, prepared for the devil and his angels:” – Matthew 25:40-41
These harsh, direct, and very clear warnings apply both to physical children (as in young humans) and also spiritual children (as in young Christians). God loves the least of us, and knowing their frailty extends more mercy and grace to those of lesser understanding in all regards but He also is more greatly angered when someone hurts or offends without cause one of these young in the kingdom, because it greatly damages their child like faith, humility, and purity of heart. This is why He promises His kingdom to those who come to Him as children while promising hell to those who harm them.
“At the same time came the disciples unto Jesus, saying, Who is the greatest in the kingdom of heaven? And Jesus called a little child unto him, and set him in the midst of them, 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. Whosoever therefore shall humble himself as this little child, the same is greatest in the kingdom of heaven. And whoso shall receive one such little child in my name receiveth me.” – Matthew 18:1-5