73. The Lord teaches the goodness of love in many places in the Word, and He teaches it by teaching reconciliation with the neighbor in Matthew:

...if you go to offer your gift upon the altar, and there remember that your brother has something against you, leave your gift there before the altar, and go. First be reconciled to your brother, and then come and offer your gift. Deal kindly with your adversary..., while you are on the way with him, lest your adversary deliver you to the judge, and the judge hand you over to the officer, and you be thrown into prison. Assuredly I say to you, you will by no means get out of there till you have paid the last penny. (Matthew 5:23-26) To be reconciled to one’s brother is to refrain from enmity, hatred and revenge. Clearly it is to refrain from them as being sins.

The Lord also teaches in Matthew:

...whatever you want people to do to you, do you also to them, for this is the Law and the Prophets. (Matthew 7:12) Thus do no evil. And this many other times.

The Lord teaches as well that to be angry with one’s brother or neighbor without good cause and to regard him as an enemy is also to commit murder (Matthew 5:21-22).