Hmmm ... you never thought I ranted, huh? I must try harder in future

But, seriously, you ask how I could reframe my description of the ease with which I can fall back into depression. Well, I could describe it as an old friend, always there for me, but that's probably worse than the terms I did use. But there is a germ of truth in that, because there is a sense of comfort, familiarity and safety about reacquainting myself with ways of thinking and behaviours that had all but faded away. Wrapping myself in a little bubble - for me, depression is so much about detachment, wilful isolation, a withdrawal from trying to cope with people's confusing behaviours, a strange sanctuary where there are no expectations and a state where there is no failure because it is failure itself. It's inaction and when I am in a depressive episode I have a built-in justification for that torpor - "I'm depressed ... I have no energy, no motivation, it's my serotonin ... blah blah ...".
Sorry, once I get writing I just go on and on. Wander horrendously off-topic. I suppose that if I try and see things in less emotional ways, there's a lot of habit there. I have become accustomed to thinking in a certain way, and negative events or even thoughts can trigger it very easily, more easily than I had hoped. But, y'know, I've been in and out of visits from the old black dog and have always survived and bounced back. No doubt I shall do so again.