Every desire is a viper in the bosom, who while he was chill was harmless; but when warmth gave him strength, exerted it in poison.

All envy is proportionate to desire; we are uneasy at the attainments of another, according as we think our own happiness would be advanced by the addition of that which he withholds from us.

Ancient travelers guessed; modern travelers measure.

I know not any crime so great that a man could contrive to commit as poisoning the sources of eternal truth.

In general those parents have the most reverence who most deserve it; for he that lives well cannot be despised.

Books have always a secret influence on the understanding.

Marriage has many pains, but celibacy has no pleasures.