Most people cannot answer the question of whether or not there is a purpose to life or not because for most people life's purpose cannot be neatly defined or directly articulated. That is why we have art, poetry and music. Some people, both religious and atheists, will have some kind of rational debate about purpose, but for many it is an emotional state, quite distinct from morality.
A number of religious people now propose that in the absence of a rational argument that people are in disagreement over for why god does or does not exist, they will talk about a god gene, or a feeling about god that they can experience and other people can't.
But I don't think it is like that. God isn't like some mountain in Japan that you have seen and I haven't. It isn't like if you have all of these immensely strong personal, emotional and spiritual feelings about the mountain that I lack because I've never seen it, and if I was capable of going there I would feel them too.
Almost all humans, whether they believe in God or not, have a great capacity to feel deeply, to feel poignancy and transcendence, to feel things that cannot be articulated. And just as many religious people feel the great spiritual, poignant, personal and emotional resonance in believing in God, I find that attempting to believe in God strickens my emotional, poignant, spiritual and emotional states. The depth of my feeling that God does not exist is as great as your depth of feeling that he does.
So I dislike the idea that atheists somehow have less depth and just faff about with a bit of moral philosophy, politics or science. We're still people with the same wide human capacities that religious people have.