Men born in hot countries love the night because it refreshes them and have a horror of light because it burns them; and therefore they are of the co… - Leonardo da Vinci

Simplicity is the ultimate sophistication.
When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return.
Learning never exhausts the mind.
Art is never finished, only abandoned.
Painting is poetry that is seen rather than felt, and poetry is painting that is felt rather than seen.
The human foot is a masterpiece of engineering and a work of art.
It had long since come to my attention that people of accomplishment rarely sat back and let things happen to them. They went out and happened to things.
I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do.
As a well-spent day brings happy sleep, so a life well spent brings happy death.
Water is the driving force of all nature.

I have offended God and mankind because my work didn't reach the quality it should have.

He who wishes to be rich in a day will be hanged in a year.