7 Thought-provoking quotes by Greek philosophers

"The only true wisdom is in knowing you know nothing." - Socrates 

"Be kind, for everyone you meet is fighting a harder battle." - Plato

"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle 

"No man ever steps in the same river twice, for it’s not the same river and he’s not the same man." - Heraclitus

"Do not spoil what you have by desiring what you have not; remember that what you now have was once among the things you only hoped for." - Epicurus

"It's not what happens to you, but how you react to it that matters." - Epictetus

"He has the most who is content with the least." - Diogenes