Blessed are those who preferreth others before themselves.
Tablets of Baha’u’llah, 71.
Hurt not others in ways that your yourself would find hurtful.
As ye would that others should do to you, do ye also to them likewise.
Holy Bible, Luke 6:31
Surely it is the maxim of loving kindness; do not unto others that you would not have them do unto you.
Analects, XV, 23
Taking Fun is not Fun. Have Fun make Fun, be Fun.
Suggestions of Baba Bar Ran.
This is the sum of all true righteousness: deal with others as thou wouldst thyself be delt by. Do nothing to thy neighbor which thou wouldst not have done to thee after.
None of you is a believer until you desire for others that which you desire for yourself.
What is hateful to you, do not to others. That is the entire Law, all the rest is commentary.
The Talmud, Shabbat, 31a.
We ought to pity the malignant tendencies of others; to rejoice over their excellence; to help them in their straits; to regard their gains as if they were our own, and their losses the same way.
The Thai-Shang, 3.
An’ it harm none, do what thou wilt.
Various Pagan traditions.
That nature only is good when it shall not do unto another whatever is not good for its own self.
Dadistan-i Dinik, 94:5.