I have learned from an early age to abjured the use of meat, and the time will come when — Leonardo da Vinci
Why does the eye see a thing more clearly in dreams than the imagination when awake? — Leonardo da Vinci
Learning acquired in youth arrests the evil of old age; and if you understand that old age has wisdom for its food — Leonardo da Vinci
Iron rusts from disuse; water loses its purity from stagnation … even so does inaction sap the vigour of the mind. — Leonardo da Vinci
Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory. — Leonardo da Vinci