From Uncommon Sense - The State is Out of Date In print - order from any bookshop at £ 6.99
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All things whatsoever you would that men should do to you, do ye even so
to them: for this is the Law and the Prophets.
What is hateful to you, do not do to your fellow man. That is the entire
Law; All the rest is commentary.
Talmud, Shabbet, 31a
No one of you is a believer until he desires for his brother that which
he desires for himself.
This is the sum of duty: Do naught unto others which would cause you pain
if done to you.
Mahabarata, 51 1517
Hurt not others in ways that you yourself would find hurtful
Surely it is the maxim of loving kindness: Do not unto others that you
would not have them do unto you.
Regard your neighbour's gain as your own gain, and your neighbour's loss
as your own loss.
T'ai Shang Kan Ying Pien
That nature alone is good which refrains from doing another whatsoever
is not good for itself.