[However], the sufferer from depression has no option, and therefore finds himself, like a walking casualty of war, thrust into the most intolerable … - William Styron

It could be all unwittingly that I wrote in Darkness Visible what amounted to a Rosetta stone for my other work.

"For those who have dwelt in depression's dark wood, and known its inexplicable agony, their return from the abyss is not unlike the ascent of the poet, trudging upward and upward out of hell's black depths and at last emerging into what he saw as "the shining world." There, whoever has been restored to health has almost always been restored to the capacity for serenity and joy, and this may be indemnity enough for having endured the despair beyond despair.

E quindi uscimmo a riveder le stelle.
And so we came forth, and once again beheld the stars."

There he must, despite the anguish devouring his brain, present a face approximating the one that is associated with ordinary events and companionship. He must try to utter small talk, and be responsive to questions, and knowingly nod and frown and, God help him, even smile. But it is a fierce trial attempting to speak a few simple words.