Love shows itself more in adversity than in prosperity; as light does, which shines most where the place is darkest.
Leonardo da VinciHow many emperors and how many princes have lived and died and no record of them remains, and they only sought to gain dominions and riches in order that their fame might be ever-lasting.
Leonardo da VinciThose who condemn the supreme certainty of mathematics feed on confusion, and can never silence the contradictions of the sophistical sciences which lead to eternal quackery.
Leonardo da Vinci