In our ideals we unwittingly reveal our vices.

Stupidity, outrage, vanity, cruelty, iniquity, bad faith, falsehood - we fail to see the whole array when it is facing in the same direction as we.

One must credit an hypothesis with all that has had to be discovered in order to demolish it.

There are certain moments when we might wish the future were built by men of the past.

When a scientist is ahead of his times, it is often through misunderstanding of current, rather than intuition of future truth. In science there is never any error so gross that it won't one day, from some perspective, appear prophetic.

One kills a man, one is an assassin; one kills millions, one is a conqueror; one kills everybody, one is a god.

When I was young I pitied the old. Now old, it is the young I pity.