3221. The discourses of the angels are sometimes represented by clouds, and by their forms, colors, movements, and changes; things affirmative of truth by bright and ascending clouds; things negative by dark and descending clouds; things affirmative of falsity by dusky and black clouds; consent and dissent by the various gatherings together and partings asunder of the clouds, and these latter as in a sky like that of the heavens in the night.