The feeling of depression comes and goes. It's usually made worse by me pretending I feel fine when I actually don't. That was the feeling - the realisation - that lead to this particular piece. Knowing the wave always bottoms out and rises again. Its done that for a long time now, so why fight it. Perhaps learn from it.
I can be very productive in the good periods. This is a rare case when i have been productive in the darker days. I take this as a good sign, a sense of maturity regarding feeling depressed. It doesn't own me, just shares my journey on some days.
Thanks again for your thoughtful comments :)