Leonardo da Vinci

He who possesses most must be most afraid of loss.

Oh! how many are the times that I have been deceived!

The painter who draws merely by practice and by eye, without any reason, is like a mirror which copies everything placed in front of it without understanding.

To develop a complete mind: Study the art of science; Study the science of art. Learn how to see. Realize that everything connects to everything else.

The wise man will want to be rich only in order to be able to help himself and his friends.

The greatest pleasure and the greatest knowledge is to understand how we are born.

The sun does not see its shadow.

Man has a body, but no soul.

Birds, being provided with wings, can always fly where they wish, and so can men, if they have wings.

The senses are of the earth, reason is of the soul.

The eye is the first organ that comes into contact with the light.

Iron rusts from disuse; stagnant water loses its purity and in cold weather becomes frozen; even so does inaction sap the vigor of the mind.

The more subtle we are, the more we are deceived.

The memory of all that is past is as nothing in comparison with the knowledge of what is to come.

The greatest good is that which is desired by all.

The earth is not the center of the sun, but the sun is the center of the earth.

The mind of the painter is a mirror of the world.

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

Life well spent is long.

Nature never breaks her own laws.