For this,
You shall not commit adultery, You shall not kill, You shall not steal, You shall not bear false witness, You shall not covet;
and if there be any other commandment, it is summed up in this saying, namely,
You shall love your neighbor as yourself.
All Commentaries on Romans 13:9 Go To Romans 13
Augustine of Hippo
AD 430
No one loves his neighbor unless he loves God, and by loving him as himself, to the limit of his ability, he pours out his love on him so that he too may love God. But if he does not love God, he loves neither himself nor his neighbor.