Business and passion.

Being passionate about one's business is likely a very good idea. Being able to separate the passion from the business is also likely a very good idea. The thought being that it can be very easy to make a poor business decision because of a passionate bias. It's a bit of a strange tightrope to walk, I think. It might be similar to the comparison between discipline and passion. It would be great to have both in large measure but having just one, either over or under represented, will often be detrimental to any sort of consistency or stability. I would say all of these reflect well the concept "moderation in all things."