A new ad campaign

There's a new ad campaign happening in London and throughout the UK on various modes of transportation including the Underground and on buses:Of course, they can't prove there is no God, just like I can't prove there is a God. It's meant to be a re-assuring campaign but the "probably" doesn't seem very re-assuring. If I was worrying about it, I don't think this would help me feel better. Of course, I am biased.