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Quote DB :: Authors :: Leonardo da Vinci :: View Quote View Quote "Iron rusts from disuse; stagnant water loses its purity and in cold weather becomes frozen; even so does inaction sap the vigor of the mind." - Copy to Clipboard   --  Leonardo da Vinci Listed in: Thinking Add Quote To Your Quote List   Rating: 3.83  Rate Quote 12 votes submitted Your Name: Friend's Email: Sponsored Links Top 5 quotes from Leonardo da Vinci "Once you have flown, you will walk the earth with your eyes turned skywards, for there you have been, and there you long to return." "As every divided kingdom falls, so every mind divided between many studies confounds and saps itself." "You do ill if you praise, but worse if you censure, what you do not understand." "Simplicity is the ultimate sophistication." "Anyone who invokes authors in discussion is not using his intelligence but his memory." Top 5 quotes from Thinking "There are two distinct classes of what are called thoughts: those that we produce in ourselves by reflection and the act of thinking and those that bolt into the mind of their own accord." "If there is any principle of the Constitution that more imperatively calls for attachment than any other it is the principle of free thought, not free thought for those who agree with us but freedom for the thought that we hate." "I am a thing that thinks, that is to say, a thing that doubts, affrims, denies, understands a few things, is ignorant of many things, wills, refrains from willing, and also imagines and senses." "What once was thought can never be unthought." "The moment we want to believe something, we suddenly see all the arguments for it, and become blind to the arguments against it."

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