Leonardo da Vinci

"Our life is made by the death of others."

"All our knowledge has its origin in our perceptions"

"As a well spent day brings happy sleep, so life well used brings happy death."

"A painter should begin every canvas with a wash of black, because all things in nature are dark except where exposed by the light."

"As every divided kingdom falls, so every mind divided between many studies confounds and saps itself."

"The knowledge of all things is possible"