Some new readings of Carl Jung suggest that his the best way to cure depression if to make ourselves useful that can be done by "work" and feel us surrounded by beautiful things (environment of beauty helps).
“Even a happy life cannot be without a measure of darkness, and the word happy would lose its meaning if it were not balanced by sadness.”
"As far as we can discern, the sole purpose of human existence is to kindle a light in the darkness of mere being". - Carl Jung