Leonardo da Vinci

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

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

Time stays long enough for anyone who will use it.

In rivers, the water that you touch is the last of what has passed and the first of that which comes so with present time.

The smallest feline is a masterpiece.

Nature never breaks her own laws.

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.

Water is the driving force of all nature.

Men of lofty genius when they are doing the least work are most active.

The greatest deception men suffer is from their own opinions.

Life is pretty simple: You do some stuff. Most fails. Some works. You do more of what works. If it works big, others quickly copy it. Then you do something else. The trick is the doing something else.

Life well spent is long.

A well-spent day brings happy sleep.

Learning never exhausts the mind.

Where there is shouting, there is no true knowledge.

All our knowledge has its origins in our perceptions.

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

Marriage is like putting your hand into a bag of snakes in the hope of pulling out an eel.

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

Experience does not err. Only your judgments err by expecting from her what is not in her power.