Oh! how foul a thing, that we should see the tongue of one animal in the guts of another. — Leonardo da Vinci
There is no higher or lower knowledge, but one only, flowing out of experimentation. — Leonardo da Vinci
My works are the issue of simple and plain experience which is the true mistress. — Leonardo da Vinci
The earth is moved from its position by the weight of a tiny bird resting upon it. — Leonardo da Vinci
It’s not enough that you believe what you see. You must also understand what you see. — Leonardo da Vinci
We might say that the earth has the spirit of growth; that its flesh is the soil. — Leonardo da Vinci
Science is the observation of things possible, whether present or past; prescience — Leonardo da Vinci