Pathfinder would handle chosen a bit different. How about a feat today?
Chosen of Life
You are chosen of a God who heals the sick and cures the fallen. You now must act according to his or her wishes.
Benefit: A number of times per day equal to your wisdom modifier you can cast cure light wounds. At fifth level, the becomes cure moderate wounds. At 10th level, the spell becomes cure serious wounds. And at 15th level, the spell becomes cure critical wounds. The DC of the spell is determined as if you were a cleric.
Note: If you act against your patrons wishes, you lose the ability granted by this feat. You must atone as a cleric would.