It is not pleasant to experience decay, to find yourself exposed to the ravages of an almost daily rain, and to know that you are turning into something feeble, that more and more of you will blow off with the first strong wind, making you less and less. Some people accumulate more emotional rust than others. Depression starts out insipid, fogs the days into a dull color, weakens ordinary actions until their clear shapes are obscured by the effort they require, leaves you tired and bored and self-obsessed- but you can get through all that. No happily, perhaps, but you can get through. No one has ever been able to define the collapse point that marks major depression, but when you get there, there’s not much mistaking it.

Andrew Solomon