There is nothing wrong with feeling morbid occasionally everyone everyone's mood swings a little day by day and even hour by hour.Were not robots that remain the same. If you are really down for a long time (2 weeks or more) and think about suicide then you need some help and call your GP. I think about different situations and how lucky I am.I have meniere's disease, COPD, and prostate cancer, but that is a lot better than my brother who died a millionaire 14 years ago of a brain tumor. All the money in the world could not save him..I am 83 and have a bit of a balance problem but I walk better than a lot of folks in their 70.s.. A good wife and friends and a hobby that gets me out with friends and makes me use my brain.
The old saying "count your blessings " is a good daily exercise just sit quietly for 5 minutes each day and count them.