Expressions full of meaning or beauty - a personal selection of quotes.

There are things known and there are things unknown, and in between are the doors of perception.

I insist on your freedom.

Jack Kerouac

Two mirrors facing each other. There is no image in between.

Zen Saying

When it comes to atoms, language can be used only as in poetry. The poet, too, is not nearly so concerned with describing facts as with creating images.

Niels Bohr

What we observe is not nature itself, but nature exposed to our method of questioning.

Werner Heisenberg

The greatest obstacle to discovery is not ignorance - it is the illusion of knowledge.

Daniel Boorstin