"Treat others as you would want them to treat you" (The Golden Rule).....essentially the same as
"Love your neighbor as yourself" (Holy Bible, Mark 12:31)
- http://en.wikipedia.org/wiki/Golden_Rule

"The remarkable thing is that we really love our neighbour as ourselves: we do unto others as we do unto ourselves. We hate others when we hate ourselves. We are tolerant toward others when we tolerate ourselves. We forgive others when we forgive ourselves. We are prone to sacrifice others when we are ready to sacrifice ourselves."
- Eric Hoffer