I am reading where Smith explores many of the images, analogies, metaphors that have been used over the centuries to try to explain or illustrate depression. These two made me laugh (not because I think they're so terribly funny, but because of the way he puts their truth):
Subterranean [places]: We'll get there sooner or later.
Flora: [. . .] According to Cesare Ripa's 1593 Iconologia, the illness is best represented by "a barren tree," since "melancholy produces the same effect on men as winter does on vegetation." True enough. On the other hand, Caspar David Friedrich's 1801 drawing "Melancholy" shows an impassable wilderness of flowerless, tangled limbs and harsh thistles. This also looks right.