I should have no use for a paradise in which I should be deprived of the right to prefer hell.

It is not easy to imagine how little interested a scientist usually is in the work of any other, with the possible exception of the teacher who backs him or the student who honors him.

We find it easy to believe that praise is sincere: why should anyone lie in telling us the truth?

I should have no use for a paradise in which I should be deprived of the right to prefer hell.

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

Renown? I've already got more of it than those I respect, and will never have as much as those for whom I feel contempt.

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