Whatever you want people to do to you, do that to them. The Golden Rule is not just one of many rules which God requires mankind to follow, but it is the entire law, all by itself. The easiest way to follow The Golden Rule is to love all other people the same as you love yourself. When you love others as you love yourself, you will naturally do to them the same as you would like them to do to you. Thus you will be following The Golden Rule, which embodies all of God's law for mankind.
Hatred stirs up strife, but love covers all offenses.
Above all hold unfailing your love for one another, since love covers a multitude of sins. Everyone is your neighbor. Yes, but God counts our love for others as if it were love for Himself. So when we love others, we are loving Him at the same time. And we cannot claim to love God until we first love our fellow man.