[aksis]

Sikhism:
Compassion-mercy and religion are the support of the entire world". Japji Sahib

"Don't create enmity with anyone as God is within everyone." Guru Arjan Devji 259

"No one is my enemy, none a stranger and everyone is my friend." Guru Arjan Dev : AG 1299

Sufism:
"The basis of Sufism is consideration of the hearts and feelings of others. If you haven't the will to gladden someone's heart, then at least beware lest you hurt someone's heart, for on our path, no sin exists but this." Dr. Javad Nurbakhsh, Master of the Nimatullahi Sufi Order.

Taoism:
"Regard your neighbor's gain as your own gain, and your neighbor's loss as your own loss." T'ai Shang Kan Ying P'ien.

"The sage has no interest of his own, but takes the interests of the people as his own. He is kind to the kind; he is also kind to the unkind: for Virtue is kind. He is faithful to the faithful; he is also faithful to the unfaithful: for Virtue is faithful." Tao Teh Ching, Chapter 49

Unitarian:
"We affirm and promote respect for the interdependent of all existence of which we are a part." Unitarian principles.

Wicca:
"An it harm no one, do what thou wilt" (i.e. do what ever you will, as long as it harms nobody, including yourself). One's will is to be carefully thought out in advance of action. This is called the Wiccan Rede

Yoruba: (Nigeria):
"One going to take a pointed stick to pinch a baby bird should first try it on himself to feel how it hurts."

Zoroastrianism:
"That nature alone is good which refrains from doing unto another whatsoever is not good for itself". Dadistan-i-dinik 94:5

"Whatever is disagreeable to yourself do not do unto others." Shayast-na-Shayast 13:29

Some philosophers' statements are:

Epictetus: "What you would avoid suffering yourself, seek not to impose on others." (circa 100 CE)

Kant: "Act as if the maxim of thy action were to become by thy will a universal law of nature."

Plato: "May I do to others as I would that they should do unto me." (Greece; 4th century BCE)

Socrates: "Do not do to others that which would anger you if others did it to you." (Greece; 5th century BCE)

Seneca: "Treat your inferiors as you would be treated by your superiors," Epistle 47:11 (Rome; 1st century CE)

Examples from moral/ethical systems are:

Humanism: "...critical intelligence, infused by a sense of human caring, is the best method that humanity has for resolving problems. Reason should be balanced with compassion and empathy and the whole person fulfilled." Humanist Manifesto II; Ethics section.

Scientology: "20: Try to treat others as you would want them to treat you." This is one of the 21 moral precepts that form the moral code explained in L. Ron Hubbard's booklet "The Way to Happiness."