Quite. The whole thing with (bad) depression is that it makes you unable to get up and do the very things that help fight it: exercise, create, see friends.
I would also add that it by necessity has to happen dynamically.
In the OP, the author recieves a nudge from his friend, but ignites his spark himself, and connects all the dots.
It's like Inception, you can read however many self-help books, blogs, studies, ideas as you'd like to try to make yourself get out of something, but it won't happen until it's "your" idea.
I have very much experienced this myself, and I can draw parallells between myself and the author, but I know that me telling anyone else won't help them (also from experience), because every transformation happens from within. All you can do is be supportive and present. Nudges and ideas can provide a seed, but they have to grow it. But there's also the risk of appearing pushy and having the opposite effect.
Yeah, might be different for different people but when I'm depressed I can become devoid of passion, and caring about things enough to carry them out becomes a daily struggle
Exactly... the mythos of the "depressed artist" is a joke; if you're truly depressed, it's almost impossible to create. The light within you is extinguished. I suspect a lot of "depressed artists" are actually manic-depressive, which would explain their bursts of creativity.