Denis Diderot

"The world is for those who think."

"Man will never be free until the last king is strangled with the entrails of the last priest."

"Nothing can be believed unless it is seen."

"I am convinced the mind can be developed to the point where success is inevitable."

"The first step toward philosophy is incredulity."

"Conscience is the inner voice which warns us that someone may be looking."

"There is no true knowledge except in knowing things."

"The happiness of man consists in his physical and moral constitution."

"Freedom is the first of all goods."

"Nature is always right."

"We swallow greedily any lie that flatters us, but we sip only suspiciously at any truth that may contain even a hint of bitter."

"Art is made for life, not life for art."

"Great men are meteors designed to burn so that the earth may light up."

"The most dangerous madness is that of the saint."

"Genius is not a gift, but a way of relating to the world."

"I love humanity but I hate humans."

"Superstition is the religion of feeble minds."

"Work is the scourge of the drinking classes."

"The role of an artist is to make revolutions."

"If you want me to believe in God, you must make me touch him."

"Change is the only universal truth."

"Knowledge is knowing a tomato is a fruit; wisdom is knowing not to put it in a fruit salad."

"I pledge allegiance to nothing and no one."

"Beauty is the sole virtue of objects."

"Music is the most passionate and personal form of expression."

"True power comes from understanding, not from force."

"The heart has its reasons which reason knows nothing of."

"To live is to act."

"What is an education? It is a system of instruction that teaches obedience to the state."

"Patience and time are the two greatest physicians."