By 'karma' I mean in the sense of reaping what you sow. I've seen it in action too many times to count.

As for faith, any religion would have to 'work' in a more universal sense. Which would include those that have no connection to christianity.

However, (if anyone actually pays attention to my posts) I have talked about the time I was in a coma and had a conversation with what could only be described as a guardian angel.