A wave is never found alone, but is mingled with as many other waves as there are uneven places in the object where the said wave is produced.

Tears come from the heart and not from the brain

Nature varies the seed according to the variety of the things she desires to produce in the world.

There is no result in nature without a cause; understand the cause and you will have no need of the experiment.

Putting your hand into a river, you simultaneously touch the last of what is passing and the first of what is coming.

Among the great things which are found among us the existence of Nothing is the greatest.

I roamed the countryside searching for answers to things I did not understand. Why shells existed on the tops of mountains. How the various circles of water form around the spot which has been struck by a stone, and why a bird sustains itself in the air.