Rather it's the non-believers who say that life is its own purpose - though for obvious reasons I'm hardly the best proponent of that. It's usually the believers who say life's purpose is only attainable after death; ergo, that the purpose of life is to be over so as to get the grand prize. Which is to say, no purpose at all in and of itself.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'