Everything you've learned in school as "obvious" becomes less and less obvious as you begin to study the universe. For example, there are no solids in the universe. There's not even a suggestion of a solid. There are no absolute continuums. There are no surfaces. There are no straight lines.
                 — R. Buckminster Fuller

The universe is like a safe to which there is a combination – but the combination is locked up in the safe.
                 — Peter DeVries