Be nicer than necessary to everyone you meet. Everyone is fighting some kind of battle.

Socrates (c. 470–399 BCE) was a Greek philosopher from Athens. He is credited as one of the founders of Western philosophy and as being the first moral philosopher of the Western ethical tradition of thought. Though he authored no texts, he is known chiefly through the accounts of classical writers composing after his lifetime, particularly by his students Plato and Xenophon.