As long as you don't practice it, this dying and becoming, You are only a dreary guest on this dark earth.

Science has been seriously retarded by the study of what is not worth knowing and of what is not knowable.

Sowing is not as difficult as reaping.

To know where a thing is we must have found it.

[W]hat counts is that one perceives excellence and dares to give it expression, which sounds little but is in fact a great deal.

The march of intellect, which licks all the world into shape, has even reached the devil.

When intelligent and sensible people despise knowledge in their old age, it is only because they have asked too much of it and of themselves.