We believe that:

• One of the best ways of getting energized at work is to start something outside of it. (You will gain new skills and new perspectives which will naturally attach to you as go about doing your day job.) 
• You should be spending at least 1,000 hours preparing for a new career (Just in case that your industry goes the way of publishing, pay phones, photo finishing and the like and either disappears or radically changes to the point where there is no room for you.) 

To which some people commented, as Rich did, we are, in essence, idiots: "When people get excited about things outside of work they end showing up to work and going through motions just to get through a day. Everyone loses. The employee loses and the employer loses. People are not going to give all of themselves as they focus on their new outside interest." Rich makes an extremely valid point — one that we think is worth elaborating on.

To read the full, original article click on this link: Is It Cheating to Have a Side Project? - Leonard A. Schlesinger, Charles F. Kiefer, and Paul B. Brown - Harvard Business Review