That man is of supreme folly who always wants for fear of wanting; and his life flies away while he is still hoping to enjoy the good things which he has with extreme labour acquired.
Man has much power of discourse which for the most part is vain and false; animals have but little, but it is useful and true, and a small truth is better than a great lie.
May it please our great Author that I may demonstrate the nature of man and his customs, in the way I describe his figure.
Let no man who is not a Mathematician read the elements of my work.
The man who blames the supreme certainty of mathematics feeds on confusion, and can never silence the contradictions of sophistical sciences which lead to an eternal quackery.
To speak well of a base man is much the same as speaking ill of a good man.
Threats alone are the weapons of the threatened man.
A man was desired to rise from bed, because the sun was already risen. To which he replied: If I had as far to go, and as much to do as he has, I should be risen by now; but having but a little way to go, I shall not rise yet.
Things that are separate shall be united and acquire such virtue that they will restore to man his lost memory.