Most religions have simple sayings that are taught to even the youngest child, reminding us to be good and decent. If the child asks "why" the explanation is that there is a reward for doing good deeds in life and punishment for doing ill. Of course, the hard evidence of those rewards and punishments remains slim. Regardless of this lack of proof, and maybe as a result of it, humans have faith.
In Tijuana, Mexico, faith in salvation and enlightenment leaves the realm of the ephemeral and metaphysical to touch the living through the work of a small group of obsessively devoted volunteers. Coming from different religions and personal histories, they deliver healthcare, both Eastern and Western medicines and practices, to otherwise abandoned populations in the outskirt colonias of Tijuana. The retired doctor we traveled with spends four days and nights a week in Tijuana so he can treat patients. "It is good to be owed when you leave this life," he explained.