In my book of the moment, "Tribes," Seth Godin talks abt being on vacation in Jamaica and early one morning he was in the hotel lobby on his laptop letting his family sleep in when some other tourists walked in and commented to one another, "Isn't that sad! That guy comes here on vacation and he's stuck checking his email. He can't even enjoy his two weeks off." Seth writes:

I think the real question – the one they probably wouldn't want to answer – was "Isn't it sad that we have a job where we spend two weeks avoiding the stuff we have to do fifty weeks a year?" It took me a long time to figure out why I was so happy to be checking my email there. It had to do with passion. Other than sleeping, there was nothing I'd rather have been doing in that moment – because I'm lucky enough to have a job where I get to make change happen. <end quote>

I like his perspective – and add that we need rest even from our passions.