The greatest human attribute HOPE. The way to destroy someone is not taking all they have or love, take away their hope. Without it life has no value.
As far as this 10-90 nonsense sounds like new age gobbledygoop. My kids know my philosophy, they can all quote it, "sometimes life will serve you a sh#t sandwich. The best thing to do is put mustard on it and eat it, leave it laying around and out gets more smelly and rancid." During the worse three months of my life I went from pastoring a church, having another career, a.house and a family. To homeless, no job, no family and I rolled my truck. I never felt sorry for myself or depressed, 13 years later I'm happier than ever. The kind of hope that sustains through that doesn't come from some feel good philosophy.