Many discoveries are reserved for ages still to come . . . . Our universe is a sorry little affair unless it has in it something for every age to investigate.

Money has never yet made anyone rich.

I never come back home with the same moral character I went out with; something or other becomes unsettled where I had achieved internal peace; some one or other of the things I had put to flight reappears on the scene.

He invites the commission of a crime who does not forbid it, when it is in his power to do so.

Virtue with some is nothing but successful temerity.

Let us not seek our disease out of ourselves; 'tis in us, and planted in our bowels; and the mere fact that we do not perceive ourselves to be sick, renders us more hard to be cured.

Familiarity reduces the greatness of things.