"All our knowledge hast its origins in..." - Quote by Leonardo Da Vinci
All our knowledge hast its origins in our perceptions … In nature there is no effect without a cause … Experience never errs; it is only your judgments that err by promising themselves effects such as are not caused by your experiments … Science is the observation of things possible, whether present or past; prescience is the knowledge of things which may come to pass.
More by Leonardo Da Vinci
“O sleepers! what a thing is slumber! Sleep resembles death. Ah, why then dost thou not work in such wise as that after death thou mayst retain a resemblance to perfect life, when, during life, thou art in sleep so like to the hapless dead?”
“Especially learn how to see.”
“A good memory, which nature has endowed us with, causes things long past to seem present.”
More on Knowledge
“My experience is that as soon as people are old enough to know better, they don't know anything at all.”
“A great deal of fear is a result of just “not knowing.” We do not know what is involved in a new situation. We do not know whether we can deal with it. The sooner we learn what it entails, the sooner we can dissolve our fear.”
“You will never get to the irreducible definition of anything because you will never be able to explain why you want to explain, and so on. The system will gobble itself up.”