The ideal, without doubt, varies, but its enemies, alas, are always the same.

The nobility of a human being is strictly independent of that of his convictions.

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.

We bestow on others praise in which we do not believe, on condition that in return they bestow upon us praise in which we do.

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.

On the brink of being satiated, desire still appears infinite.