I think there is no longer much doubt about the mind/body connection, but churchgoing, faith, positive (or even negative) community involvement and meaningful relationships often have one element in common: they lower depression. That’s because they increase a sense of purpose and meaning in life, and therefore stimulate motivation to act. The desire to act raises energy and lowers depression. The truth is strong love of almost anything or any activity lowers depression, I believe, if there is hope of continued gratification.