Lust is the source of all our actions, and humanity.

It is your own assent to yourself, and the constant voice of your own reason, and not of others, that should make you believe.

How shall one who is so weak in his childhood become really strong when he grows older? We only change our fancies.

However vast a man's spiritual resources, he is capable of but one great passion.

All I know is that I must soon die, but what I know least is this very death which I cannot escape.

The secrets of nature are concealed; her agency is perpetual, but we do not always discover its effects; time reveals them from age to age; and although she is always the same in herself, she is not always equally well known.

Man is neither angel nor beast.