A lot of great points raised, but there's still something to be said for working in a field you enjoy. Forget the semantic dance around the meaning of the word "passion" for a minute.<p>Let's take the author's hypothetical example of the person who's really into composting. Maybe this person isn't "passionate" about composting to the point of stark-raving obsession, but pretty much anywhere just shy of that mark is feasible. This person is probably better served working in the gardening industry -- maybe as a landscape designer, or an executive at a home & garden brand, or starting up a community or zine or product line around gardening, etc. -- than in, say, the auto industry.<p>What determines whether or not this person should <i>actually</i> pursue his "passion" for composting in the professional arena? The degree of love for the subject, certainly, but also risk tolerance and perseverence. Those are the two critical, but oft-overlooked factors that the "follow your passion!" self-help gurus gloss over.<p>The hard truth is that not everyone's cut out for following his or her passion. Some have the drive, the obsession, the work ethic, the aptitude, and the right mix of circumstances to make it happen. Some don't. The real trick isn't testing how strong your passion is; it's testing how strong <i>you</i> are.