Leonardo da Vinci - 1452-1519.

Italian artist, scientist, engineer, inventor and philosopher, Leonardo da Vinci is generally accepted as an all-round genius whose paintings and inventions changed the world.

His keen eye and quick mind led him to make important scientific discoveries, but he never published his ideas.

A gentle vegetarian who loved animals and despised war, he nevertheless worked as a military engineer to invent advanced and deadly weapons.

Freely acknowledged as one of the greatest painters of the Italian Renaissance, yet he left only a handful of completed paintings.

Simplicity is the ultimate sophistication.

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

Art is never finished, only abandoned.

There are three classes of people: those who see. Those who see when they are shown. Those who do not see.

Where the spirit does not work with the hand there is no art.

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

Iron rusts from disuse; water loses its purity from stagnation ... even so does inaction sap the vigour of the mind.

A well-spent day brings happy sleep.

Learning never exhausts the mind.

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

You can have no dominion greater or less than that over yourself.

All our knowledge has its origins in our perceptions.

Where there is shouting, there is no true knowledge.

The noblest pleasure is the joy of understanding.

Time stays long enough for anyone who will use it.

Our life is made by the death of others.

The depth and strength of a human character are defined by its moral reserves. People reveal themselves completely only when they are thrown out of the customary conditions of their life, for only then do they have to fall back on their reserves.

The eye sees a thing more clearly in dreams than the imagination awake.

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

Beyond a doubt truth bears the same relation to falsehood as light to darkness.

You do ill to praise, but worse to censure, what you do not understand.

He who does not punish evil commands it to be done.

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.

Common Sense is that which judges the things given to it by other senses.

As every divided kingdom falls, so every mind divided between many studies confounds and saps itself.

Wisdom is the daughter of experience.

The desire to know is natural to good men.

Anyone who conducts an argument by appealing to authority is not using his intelligence he is just using his memory.

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.

I love those who can smile in trouble, who can gather strength from distress, and grow brave by reflection.