What is the biblical basis for the idea that the church is a hospital for sinners?

Pope Francis, in his [recent interview](http://www.americamagazine.org/pope-interview) , uses a very common metaphor for the church: >“I see clearly,” the pope continues, “that the thing the church needs most today is the ability to heal wounds and to warm the hearts of the faithful; it needs nearness, proximity. I see the church as a field hospital after battle. It is useless to ask a seriously injured person if he has high cholesterol and about the level of his blood sugars! You have to heal his wounds. Then we can talk about everything else. Heal the wounds, heal the wounds.... And you have to start from the ground up I've heard this, and even preached this, but I'm realizing that I don't really know where its Biblical basis comes from. What is the biblical justification for understanding the church as a place where believers are supposed to be emotionally healed?