Read "Cumuli" at The Eldritch Dark:
This poem from Clark Ashton Smith (CAS) captures the contemplative experience of watching the clouds drift by, although given that it is the work of CAS, it manages to take a step beyond the mundane:
Below their sun-bright passes, leading palely down
To meadows never seen,
Are fruits that star with shadowy gold the strange demesne,
The purple realms of peace that bear no tower nor town.
The last line in that stanza seems to be more than an idle fancy, as "purple realms of peace that bear no tower nor town" speaks to the ideal of a natural world free of the footprint of mankind and his ponderous creations.