Gainful employment --- a job, a hobby, or active use of your mind?  What brings us the most 'emjoyment'?

Using your mind to engage in thoughtful activity, as opposed to idle mindlessness, is one of the secrets of living a happy life.

So, no matter what you do for a living or enjoy doing as a hobby, make sure you keep your mind active!!! 

"A mind always employed is always happy.  This is the true secret, the grand recipe, for felicity."