Philosophy is the true mother of science.

If I had more time, I would have written a shorter letter.

The master sometimes serves, and the servant sometimes is master.

The diligent farmer plants trees, of which he himself will never see the fruit.

Vicious habits are so odious and degrading that they transform the individual who practices them into an incarnate demon.

Time obliterates the fictions of opinion and confirms the decisions of nature.

Those who do not know history will forever remain children