Some simple facts about clouds...

The World of Clouds – Intro for CloudSpotter app from CloudSpotter on Vimeo.

That's one way to think about clouds; here is another (or my way):
The beauty of clouds is their coming and going. Their drifting by the window. Their thickening and thinning... This is Plato's vision of time. This is the moving image of eternity
A planet without clouds could never produce philosophers or poets.