Paul-Henri Thiry Holbach

"True friendship is a plant of slow growth."

"Patience is the companion of wisdom."

"The greatest truths are the simplest things in the world, simple as your own breath."

"Health is a state of complete physical, mental and social well-being."

"To know oneself, one should assert oneself."

"The idea of God is the sole wrong for which I cannot forgive mankind."

"The cause of all man's calamity is his ignorance of his own power."

"Money cannot buy love or happiness."

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

"Death is nothing at all; I have only slipped away to the next room."

"Nature is the best physician; gratitude is the best prayer."

"Superstition is the poison of the mind."

"Man will continue to commit atrocities as long as he continues to believe things without evidence."

"The most absurd and reckless thing a man can do is to believe himself infallible."

"Every revolution was first a thought in one man's mind."

"The secret of happiness is to see all the marvels of the world, to see it very well."

"Laws are not made for the virtuous; they are made to punish the wicked."

"We are reasonable enough when we follow the light of reason."

"Sentiment without action is the ruin of the soul."

"Familiarity breeds contempt."

"The world is a beautiful book, but of little use to him who cannot read it."

"Courage is resistance to fear, mastery of fear—not absence of fear."

"Dreams are the free flight of the soul unchecked by reason."

"Art is the expression of the idea of the infinite."

"True science teaches doubt and reverence; fake science teaches arrogance."

"We cannot think only of our own nation, but of mankind as a whole."

"Literature is the most beautiful of all the arts."

"A man is known by the company he keeps."

"The tree of liberty must occasionally be refreshed with the blood of patriots."

"War is the invention of the devil."