Personal journalWhoever in discussion adduces authority uses not intellect but rather memory.Leonardo da Vinci1519★ 4.0
Personal journalIron rusts from disuse; stagnant water loses its purity and in cold weather becomes frozen; even so does inaction sap the vigor of the mind.Leonardo da Vinci1519★ 3.9
Personal journalHuman subtlety... Will never devise an invention more beautiful, more simple or more direct than does Nature, because in her inventions nothing is lacking, and nothing is superfluous.Leonardo da Vinci1519★ 3.8
Personal journalMan and animal are merely a passage and channel for food, a tomb for other animals, a haven for the dead, giving life by the death of others, a coffer full of corruption.Leonardo da Vinci1508★ 2.1
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