All our knowledge has its origins in our perceptions.
Leonardo da Vinci

Life well spent is long.
Leonardo da Vinci

Our life is made by the death of others.
Leonardo da Vinci

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

Time stays long enough for anyone who will use it.
Leonardo da Vinci

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