I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do.

- Leonardo da Vinci

The truth of things is the chief nutriment of superior intellects.

- Leonardo da Vinci

The human foot is a masterpiece of engineering and a work of art.

- Leonardo da Vinci

I have found that, in the composition of the human body as compared with the bodies of animals, the organs of sense are duller and coarser. Thus, it is composed of less ingenious instruments, and of spaces less capacious for receiving the faculties of sense.

- Leonardo da Vinci

Knowledge of the past and of the places of the earth is the ornament and food of the mind of man.

- Leonardo da Vinci

Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature because in her inventions nothing is lacking, and nothing is superfluous.

- Leonardo da Vinci

The length of a man's outspread arms is equal to his height.

- Leonardo da Vinci

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

- Leonardo da Vinci

Time abides long enough for those who make use of it.

- Leonardo da Vinci

The greatest deception men suffer is from their own opinions.

- Leonardo da Vinci

Painting is concerned with all the 10 attributes of sight; which are: Darkness, Light, Solidity and Colour, Form and Position, Distance and Propinquity, Motion and Rest.

- Leonardo da Vinci

Tears come from the heart and not from the brain.

- Leonardo da Vinci

Why does the eye see a thing more clearly in dreams than the imagination when awake?

- Leonardo da Vinci

Art is never finished, only abandoned.

- Leonardo da Vinci

While I thought that I was learning how to live, I have been learning how to die.

- Leonardo da Vinci

For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.

- Leonardo da Vinci

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.

- Leonardo da Vinci

Nothing strengthens authority so much as silence.

- Leonardo da Vinci

Learning never exhausts the mind.

- Leonardo da Vinci

Simplicity is the ultimate sophistication.

- Leonardo da Vinci