All our knowledge has its origin in the senses.
Ogni nostra cognizione principia dai sentimenti.

Artists
Leonardo da Vinci
Born in 1452 in Vinci, Leonardo mastered painting, anatomy, and engineering. The Mona Lisa and Last Supper define Western art; six thousand notebook pages anticipate discoveries centuries ahead.
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Leonardo da Vinci's Other Quotes
Related Quotes
For thinking and Being are the same.
-- Parmenides
You must learn all things: both the steadfast heart of well-rounded Truth and the opinions of mortals, in which there is no true trust.
-- Parmenides
Imagine prisoners chained underground since childhood, seeing only shadows on a wall and taking them for reality.
-- Plato
I know that I know nothing.
-- Socrates
Color exists by convention, sweet by convention, bitter by convention; in reality there are only atoms and void.
-- Democritus
Those who understand that things arise dependently know them to be empty.
-- Nagarjuna