Things are pretty, graceful, rich, elegant, handsome, but, until they speak to the imagination, not yet beautiful.

~Ralph Waldo Emerson

The most beautiful thing we can experience is the mysterious.  It is the source of all true art and all science.  He to whom this emotion is a stranger, who can no longer pause to wonder and stand rapt in awe, is as good as dead: his eyes are closed.

~Albert Einstein