I've been meditating on this fact for a while. (I take an SSRI, and I believe that it helps me, but I would love to know why.) I think one possible understandi

I've been meditating on this fact for a while. (I take an SSRI, and I believe that it helps me, but I would love to know why.) I think one possible understanding of depression is that it is a feedback loop - it's a sort of standing wave or Nash equilibrium of patterns of thought causing patterns of behavior causing patterns of sensation causing patterns of emotion that cause patterns of thought, etc. And, perhaps, that just by changing any random variable(s) in that loop (mucking with reuptake, or cognitive behavioral therapy, or any of a whole bunch of other possible changes) has a probability of disrupting the equilibrium and suspending the depression. It's not clear to me how to test this hypothesis, though.