As seen during a walk at dusk...
Photographer Alfred Stieglitz was fascinated by the abstract nature of clouds and took a series of them during the 1920s and 30s. He called them Equivalents, corresponding them to the idea that abstract forms, lines, and colors could represent inner states, emotions and ideas-- "vibrations of the soul." (That last bit from the abstract painter Wassily Kandinsky)
Here's another take on clouds:
I've looked at clouds from both sides now,
from in and out and still somehow,
it's cloud illusions I recall
I really don't know clouds at all...