Who said "To be a good man, one must deal justly with all men."?

This quote is attributed to Herbert Spencer.

To be a good man, one must deal justly with all men. - Herbert Spencer

"To be a good man, one must deal justly with all men."

Herbert Spencer

Philosopher Sociologist British 1820–1903

"The great aim of education is not knowledge but action."

"Progress is not an accident but a necessity."

"The ultimate result of shielding men from the effects of folly is to fill the world with fools."

"Life is the continuous adjustment of internal relations to external relations."