Of the four elements water is the second in weight and the second in respect of mobility. It is never at rest until it unites with the sea.
The Book of the science of Mechanics must precede the Book of useful inventions.
Not to anticipate is already to moan.
...The world wouldn't be the world, without trouble.
He who does not understand the supreme certainty of mathematics is wallowing in confusion.
The first object of the painter is to make a flat plane appear as a body in relief and projecting from that plane