Happiness upon retiring is not necessarily about not working. I think it is more about the end of “striving” through life. If you don’t hate your job, even if you love your job, retirement is a welcome relief. It’s not just that you don’t have to get up and participate in the rat race anymore, it’s that you get to enjoy life at a slower pace. There’s nothing further to prove. If you have an ambition—to write a book, or travel the world, or make art—whatever it is—you are now doing it for yourself. There’s freedom in that.