Romans 13:8

Owe no man anything, save to love one another: for he that loveth his neighbor hath fulfilled the law.

Greathouse understood the first clause here as the negative statement of the first clause in Romans 13:7, thus referring it to the obligations of custom, tribute, honor, etc. He said:

This means, do not continue in a state of owing any of the obligations referred to in Romans 13:7, but fulfill them and discharge them. There is only one debt of which you can never get rid - the debt of love.[3]

The discharge of all debts and the keeping of all commandments is summed up in the one word of a man's loving others as he loves himself. This applies to all commandments of a social or man-ward nature. There are other commands which spring out of the love of God, this dual direction of human obligation being demonstrated in the fact of there having been two tables of the Decalogue. Paul made this nice distinction by quoting only man-ward obligations in his next statement.