"The sage has no interest of his own, but regards 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 Te Ching, Chapter 49 (~500 BC)
"Regard your neighbor's gain as your own gain and your neighbor's loss as you own loss."
T'ai Shang Kan Ying P'ien 3
"Pity the misfortunes of others; rejoice in the well-being of others; help those who are in want; save men in danger; rejoice at the success of others; and sympathise with their reverses, even as though you were in their place."