A wise man sees as much as he ought, not as much as he can.

As far as I am concerned, no road that would lead us to health is either arduous or expensive.

This notion [skepticism] is more clearly understood by asking "What do I know?"

No spiritual mind remains within itself; it is always aspiring and going beyond its own strength.

There is not one of us that would not be worse than kings, if so continually corrupted as they are with a sort of vermin called flatterers.

Man (in good earnest) is a marvellous vain, fickle, and unstable subject, and on whom it is very hard to form any certain and uniform judgment.

The utility of living consists not in the length of days, but in the use of time; a man may have lived long, and yet lived but a little.