Leonardo da Vinci

The greatest pleasure is to be able to do what you want.

Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity.

Truth was the only daughter of Time.

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

The greatest genius will be the most ready to learn, and the most ready to teach.

The more subtle the observation, the more profound the understanding.

The human bird will take his first flight, filling the world with amazement, all writings with his fame, and bringing eternal glory to the nest whence he sprang.

Poor is the pupil who does not surpass his master.

The senses are the windows of the soul.

The greatest good is that which is desired by the greatest number.

The movement of the air against the wing of a bird is what supports it.

The body is a machine, and its functions are governed by mechanical principles.

Man has a natural desire to know.

The greatest pleasure is to surmount difficulties.

The painter who has no doubts will achieve little.

The wise man is he who knows that he knows nothing.

The painter who draws merely by practice and by eye, without any reason, is like a mirror which reflects all objects without understanding them.

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

The eye sees a thing more clearly than the mind understands it.

Experience is a truer guide than the words of others.