I can see what this campaign is trying to achieve and I am not offended. However, as 'clever' as the slogan is there is something 'lacking' in the statement. I'm not sure how to convey what I mean, and maybe I can't because I'm not an atheist. Imagine someone who has a shit life, maybe they are starving or in a war-torn country surrounded by death and suffering and they have a hope that this is not all there is. How can they 'enjoy' themselves if their one shot at life was fucked through no choice of their own? A child who dies - how do you take its parents' hope that they will see their child again, away, in such a flippant way, it seems? This is an emotive response and I just felt I had to put forward these observations as I'm sure many people reading the slogan may feel despair rather than the liberation it is meant to encourage. I can see the counter-slogan posters appearing outside the churches, playing on the words and you may say playing on the fears of people.
"The eternal mystery of the world is its comprehensibility"
Albert Einstein
Albert Einstein