How do you prove what you believe in?
Many people go to their church every Sunday, and for 1-3 hours they appear to be devout Christians. But, as soon as their foot hits the sidewalk outside of that church, they are backstabbing, lying, cheating, swindlers.
I see it all the time where I live. Utah even recently was FORCED to pass a law that makes using your church affiliation to scam fellow members a separate offense you can be charged with.
As far as we know, Obama could be a Christian - he just ‘forgets’ the message when he leaves the building. Then again, look who he has opted to choose as his teacher.
By his fruits ye will know him.