This is my history; like all other histories, a narrative of misery.
In youth, it is common to measure right and wrong by the opinion of the world, and in age, to act without any measure but interest, and to lose shame without substituting virtue.
To keep your secret is wisdom; but to expect others to keep it is folly.
If a man has a science to learn he must regularly and resolutely advance.
A man is not obliged honestly to answer a question which should not properly be put.
The mind is seldom quickened to very vigorous operations but by pain, or the dread of pain. We do not disturb ourselves with the detection of fallacies which do us no harm.