The Torah teaches: "When an alien lives with you in your land, do not
mistreat him. The alien living with you must be treated as one of your
native-born. Love him as yourself, for you were aliens in Egypt"
The New Testament teaches: "Do unto others as you would have them do unto you."
The Koran teaches: "None of you truly believes until he loves for his brother what he loves for himself."
Bhagavad Gita teaches: "This is the sum of duty; do naught unto others what you would not have them do unto you."
Confucius taught: "What you do not wish upon yourself, extend not to others."
Buddism teaches: "Hurt not others in ways
that you yourself would find hurtful.
"Robert Heinlein objects through his character Jubal Harshaw when he observes that treating others as you would like to be treated may not be appropriate. He'd rather that you treat others as they would like to be treated. This may seem to be a subtle difference.
Matt Harding goes walkabout
click the link to view the High Quality version (recommended)
http://www.youtube.com/watch?v=zlfKdbWwruY