"All the law is fulfilled in one word, and that is, love. See Rom. 13:10. All obedience begins in the affections, and nothing in religion is done right, that is not done there first. Love is the leading affection, which gives law, and gives ground, to the rest; and therefore that, as the main fort, is to be first secured and garrisoned for God. Man is a creature cut out for love; thus therefore is the law written in the heart, that it is a law of love. Love is a short and sweet word; and, if that be the fulfilling of the law, surely the yoke of the command is very easy. Love is the rest and satisfaction of the soul; if we walk in this good old way, we shall find rest."
The sum of the Law is indeed Love