A few years ago, this strange micro-trend appeared: A handful of Dallas-area megachurch pastors were diagnosed with cancer within the span of about 12 months. Now, we’ve don’t exactly have a shortage of large churches here in Dallas, but still, it was weird and disturbing. It hit closer to home because my pastor was one of the handful. Andy’s diagnosis was out of the blue, and it was serious: stage 4 colon cancer by the time they caught it. Grim…