Think? Why think! We have computers to do that for us.

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

Kill one man, and you are murderer.

One must either take an interest in the human situation or else parade before the void.

Nothing leads the scientist so astray as a premature truth.

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

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.