I remember reading about someone whose passion (perhaps obsession) was rescuing stray dogs in a big city. People would often ask him why he didn't apply that e

I remember reading about someone whose passion (perhaps obsession) was rescuing stray dogs in a big city. People would often ask him why he didn't apply that energy to the homeless. His response, roughly: why don't you? Dogs are his passion. Volunteer for the activities you're passionate about. And stop sniping at people who are making the world a better place just because you think you know better than they do what's worth saving.