We do not like to be robbed of an enemy; we want someone to hate when we suffer. It is so depressing to think that we suffer because we are fools; yet, taking mankind in the mass, that is the truth.

Most of the greatest evils that man has inflicted upon man have come through people feeling quite certain about something which, in fact, was false.

One of the most powerful of all our passions is the desire to be admired and respected.

Vanity is a motive of immense potency.

Without effort and change, human life cannot remain good. It is not a finished Utopia that we ought to desire, but a world where imagination and hope are alive and active.

I am firm; YOU are obstinate; HE is a pig-headed fool.

If everything must have a cause, then God must have a cause. If there can be anything without a cause, it may just as well be the world as God, so that there cannot be any validity in that argument... The idea that things must have a beginning is really due to the poverty of our imagination.