But the valid issue is the extent to which man knows how to form and master the material at his command.

The world only goes forward because of those who oppose it.

Life belongs to the living, and he who lives must be prepared for changes.

Then to the depths! - I could as well say height: It's all the same.

The force of a language does not consist of rejecting what is foreign but of swallowing it.

One errs as long as one strives.

I do not know myself, and God forbid that I should.