“In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, neither he that loveth not his brother.”
King James Version (KJV)
3:10 Neither he that loveth not his brother - Here is the transition from the general proposition to one particular.
1Jo 3:10 In this the children of God are manifest, and the children of the devil. Thus is the distinction clear between God's children and those of the devil. God's children are full of love and live holy lives. Those of the devil are the opposite.