The men of experiment are like the ant; they only collect and use. But the bee...gathers its materials from the flowers of… — Leonardo da Vinci Copy Share Image
One day the world will look upon research upon animals as it now looks upon research on human beings. — Leonardo da Vinci Copy Share Image
Experience never misleads; what you are misled by is only your judgment, and this misleads you by anticipating results from experience of… — Leonardo da Vinci Copy Share Image
There is no result in nature without a cause; understand the cause and you will have no need of the experiment. — Leonardo da Vinci Copy Share Image
Experience does not ever err; it is only your judgment that errs in promising itself results which are not caused by your… — Leonardo Da Vinci Copy Share Image
No human investigation can claim to be scientific if it doesn't pass the test of mathematical proof. — Leonardo da Vinci Copy Share Image
All our knowledge hast its origins in our perceptions … In nature there is no effect without a cause … Experience never… — Leonardo da Vinci Copy Share Image
The evil which does me no harm is like the good which in no wise avails me. — Leonardo da Vinci Copy Share Image
A painter should begin every canvas with a wash of black, because all things in nature are dark except where exposed by the light. — Leonardo da Vinci Copy Share Image
An arch consists of two weaknesses which, leaning one against the other, make a strength. — Leonardo da Vinci Copy Share Image
But to me all sciences seem vain and full of error that are not born of experience, mother of all certainty, and do not… — Leonardo da Vinci Copy Share Image
It is ordained that to the ambitious, who derive no satisfaction from the gifts of life and the beauty of the world, life shall… — Leonardo da Vinci Copy Share Image
Be a mirror, absorb everything around you and still remain the same — Leonardo da Vinci Copy Share Image
Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature because in her inventions nothing is lacking,… — Leonardo da Vinci Copy Share Image
People reveal themselves completely only when they are thrown out of the customary conditions of their life. — Leonardo da Vinci Copy Share Image
