In a way, the main fault of all books is that they are too long.

Man never rises to great truths without enthusiasm.

We are so presumptuous that we think we can separate our personal interest from that of humanity, and slander mankind without compromising ourselves.

Sometimes a lengthened period of prosperity melts away in a moment; just as the heat of summer flies before a day of tempest.

Reason deceives us more often than does nature.

Persevere in the fight, struggle on, do not let go, think magnanimously of man and life, for man is good and life is affluent and fruitful.

All erroneous ideas would perish of their own accord if given clear expression.