Democritus

"Happiness resides not in strength of body, but in strength of character."

"Man must either live well or make a good end."

"The brave man is not he who does not feel afraid, but he who conquers that fear."

"Education is the most powerful weapon which you can use to change the world."

"Know thyself."

"Nothing exists except atoms and empty space; everything else is opinion."

"Friendship based on profit is not true friendship."

"The greatest wealth is health."

"Cheerfulness and tranquility are the source of true contentment."

"If you remove the unjust, you will find no one left."

"It is hard to fight against anger; for a man will buy a moment's pleasure with his life."

"The man who flies from trial is not yet a man."

"All things are changing; nothing truly ceases to be."

"Deliberation is the consultation of the wise; rashness, of fools."

"In all things of nature there is something marvelous."

"The atoms and void alone truly exist."

"To be everywhere is to be nowhere."

"Do not try to establish all things by rules; many things are better left to custom."

"The things we want are transformations of the things we already have."

"Fortune is not generous with her favors."

"If one wished to examine the opinions of men, he would find a host of contradictions."

"The man who makes a fair compact with another should not play false."

"Envy is foreign to the man of understanding."

"Poverty and wealth are not terms of freedom or slavery of the body, but of the soul."

"Hope is the dream of the waking man."

"By convention there is color, by convention sweetness, by convention bitterness; in reality there are atoms and void."

"The secret source of humor itself is not joy but sorrow."

"Strength and confidence are produced by preparation."

"It is greed to do all the talking but not to want to listen at all."

"Nothing is created from nothing, nor passes into non-existence."