There is no fulfillment in things whatsoever. And I think one of the reasons that depression reigns supreme amongst the rich and famous is some of them thought that maybe those things would bring them happiness. But what in fact does is having a cause having a passion. And that's really what gives life's true meaning.
A strong body makes the mind strong. As to the species of exercises I advise the gun. While this gives moderate exercise to the body it gives boldness enterprise and independence to the mind. Games played with the ball and others of that nature are too violent for the body and stamp no character on the mind. Let your gun therefore be your constant companion of your walks.