Democritus

"The man who lives for others shall find that he lives for himself."

"Understanding the nature of the infinite is to understand the nature of one's own soul."

"Custom is the law of the foolish; reason is the law of the wise."

"The body is the temple of the soul; treat it with respect."

"What the eye cannot see, the mind can know through reason."

"The person of good character is envied by many but hated by few."

"To change one's mind is not weakness; to refuse to change is."

"The greatest enemy of truth is not the lie, but the belief in its permanence."

"In the void between certainties, all possibilities exist."

"The man who serves others well serves himself best."

"Pleasure, like a spice, is valued for its rarity, not its abundance."

"The mind that questions never stops growing; the mind that ceases to question ceases to live."

"What we call luck is often merely the meeting of preparation and opportunity."

"The atoms of which we are made have existed since the beginning; we are ancient and eternal."

"A man's true wealth is measured not in gold but in the friends he keeps."

"The person who knows himself needs not fear the judgments of others."

"In teaching others, we teach ourselves; in learning from others, we grow wise."

"The pursuit of power without virtue is the pursuit of a phantom."

"What seems impossible today becomes commonplace tomorrow through persistence."

"The wise man adapts himself to circumstances as water adapts to its vessel."

"Courage is not the absence of fear, but action in spite of it."

"The man who understands the nature of atoms understands the universe."

"In every ending is the seed of a new beginning."

"The person who loves wisdom loves solitude, for there he finds her."

"What we repeatedly think becomes the foundation of our character."

"The greatest gift to posterity is the example of a life well-lived."

"In the vast cosmos, man's place is small, but his mind is infinite."

"The man who master one subject masters principles applicable to all."

"To acknowledge one's ignorance is the first step toward wisdom."

"The pursuit of happiness through wealth is like chasing one's shadow."