Work to live, not live to work is the old adage and it is very true. For every person that I know that has gone downhill after retiring, there are a number more who have carried on and basically finished themselves off. As you get into your sixties and seventies your body and mind naturally ages, slows down and becomes unable to deal fully with the stresses and strains of normal working life. Whats the point of carrying on working if you don't need to ? Enjoy yourself more and find something else to do with your time. As my old mother used to say - you are a long time dead.