I can tell you what completeness is for me, or was.
That is the biggest trigger to my depression.
There was a time 3 years ago that I had everything and did everything I wanted. I had what I needed and lived an active life of joy. I had a job I loved, I could afford my chosen lifestyle, I was surrounded by friends. I was active outdoors, actively creating my art, actively socializing, and active in my work and out of work communities. Much of my bucke list was being checked off. I loved life, I loved my life.
But that came to a screeching end because of illness. Today I have nothing and do nothing. I fear I will never even have a glimpse of that person I used to be. That it is all downhill from there.