Have patience awhile; slanders are not long-lived. Truth is the child of time; erelong she shall appear to vindicate thee.

Innocence is indeed a glorious thing; but, unfortunately, it does not keep very well and is easily led astray.

One cannot avoid a certain feeling of disgust, when one observes the actions of man displayed on the great stage of the world. Wisdom is manifested by individuals here and there; but the web of human history as a whole appears to be woven from folly and childish vanity, often, too, from puerile wickedness and love of destruction: with the result that at the end one is puzzled to know what idea to form of our species which prides itself so much on its advantages.

An action, to have moral worth, must be done from duty.

A lie is the abandonment and, as it were, the annihilation of the dignity by man.

If I am to constrain you by any law, it must be one by which I am also bound.

The question is not so much whether there is life on Mars as whether it will continue to be possible to live on Earth