Immanuel Kant
"Act only according to that maxim whereby you can, at the same time, will that it should become a universal law."

Jesus
"So in everything, do to others what you would have them do to you, for this sums up the Law and the Prophets."

Hillel the Elder
"What is hateful to you, do not do to your fellow: this is the whole Torah; the rest is the explanation; go and learn."

Slightly varying accents all describing the same foundational absolute.

See: A Discussion on Superrationality