3 Nephi 14

Do unto others what you would have done unto you.

It's as simple as that.


Elder Russell M. Nelson:

“[Jesus] taught the Golden Rule, saying, ‘All things whatsoever ye would that men should do to you, do ye even so to them’ [Matthew 7:12; 3 Nephi 14:12]. This principle is found in nearly every major religion. Others such as Confucius and Aristotle have also taught it. After all, the gospel did not begin with the birth of the Babe in Bethlehem. It is everlasting. It was proclaimed in the beginning to Adam and Eve. Portions of the gospel have been preserved in many cultures. Even heathen mythologies have been enriched by fragments of truth from earlier dispensations. 

“Wherever it is found and however it is expressed, the Golden Rule encompasses the moral code of the kingdom of God. It forbids interference by one with the rights of another. It is equally binding upon nations, associations, and individuals. With compassion and forbearance, it replaces the retaliatory reactions of ‘an eye for an eye, and a tooth for a tooth’ [Matthew 5:38]. If we were to stay on that old and unproductive path, we would be but blind and toothless” ("'Blessed Are the Peacemakers'").