Calling Pt 2

I'm reading through Not For Sale by David Batstone. Here's a quote on calling that stood out to me:

"How do you find your vocation? You locate where your passion meets the needs of the world. The first part of that equation is to engage yourself in those activities that you feel you are put on this earth to do. The second part of that equation is to carry out those activities so as the benefit others. The world is filled with unhappy people who are doing work that they do not care about, all for the sake of making more money or because they are trying to fulfill someone else's dreams."

I'm still chewing on that.