Now I am about to take my last voyage, a great leap in the dark.

A man's conscience and his judgment is the same thing; and as the judgment, so also the conscience, may be erroneous.

Prudence is but experience, which equal time, equally bestows on all men, in those things they equally apply themselves unto.

No man's error becomes his own Law; nor obliges him to persist in it.

There is no such thing as perpetual tranquillity of mind while we live here; because life itself is but motion, and can never be without desire, nor without fear, no more than without sense.