And the second is like unto it, Thou shalt love thy {q} neighbour as thyself.

(q) Another man.

People's New Testament

22:39 The second is like. The first command sums up what man owes to God; the second, what he owes to his fellow-man.

Thou shalt love thy neighbour as thyself. See Le 19:18. One who loves God supremely, will not live in disobedience; one who loves his neighbor as himself, will seek the welfare of those around him.

Wesley's Notes

22:39 Lev 19:18.

Matthew Henry's Concise Commentary

22:34-40 An interpreter of the law asked our Lord a question, to try, not so much his knowledge, as his judgment. The love of God is the first and great commandment, and the sum of all the commands of the first table. Our love of God must be sincere, not in word and tongue only. All our love is too little to bestow upon him, therefore all the powers of the soul must be engaged for him, and carried out toward him. To love our neighbour as ourselves, is the second great commandment. There is a self-love which is corrupt, and the root of the greatest sins, and it must be put off and mortified; but there is a self-love which is the rule of the greatest duty: we must have a due concern for the welfare of our own souls and bodies. And we must love our neighbour as truly and sincerely as we love ourselves; in many cases we must deny ourselves for the good of others. By these two commandments let our hearts be formed as by a mould.