Adam Clarke on 1 John 4:11

If God so loved us - Without any reason or consideration on our part, and without any desert in us; we ought also, in like manner, to love one another, and not suspend our love to a fellow-creature, either on his moral worth or his love to us. We should love one another for God's sake; and then, no unkind carriage of a brother would induce us to withdraw our love from him; for if it have God for its motive and model, it will never fail.