Some people accomplish a great deal, yet they are unhappy because they keep thinking that "somewhere else" they might be able to accomplish more. They live their lives with the general feeling that whatever they are engaged in at the moment is nothing compared to what they might possibly do.

This feeling is a poison that destroys joy and happiness in life. While you should try to accomplish as much as you can, it is often an illusion that you are missing out by not being "somewhere else."