Keller’s next clue to the existence of god is the presence of beauty. Keller says that true beauty elicits in us a desire for god and the existence of this desire indicates that a god exists, just as hunger indicates that food exists. Keller begins this section by saying
If we are the result of blind natural forces, then what we call “love” is simply a biochemical response, inherited from ancestors who survived because this trait helped them survive.
Keller disparages this interpretation implicitly, suggesting that love cannot be only this. This seems weird to me on several levels. First, it is simply amazing to think that we, a complex collection of atoms, through evolution over billions of years have developed brains complex enough to experience love. Love seems more meaningful as the culmination of a million generations of evolution than as an abstract notion bestowed on us by a vague creator. Second, since love, and beauty and justice and other Keller examples, are entirely internal phenomena, their origins cannot diminish their impact. Love feels as nice and is just as wonderful whether it’s a gift bestowed by god or an evolved method of gene replication. I see no need for Keller’s bias against a materialist interpretation of these concepts.
Moving on to the main argument, that a desire for god is evidence of god, I call bull. First, not everyone feels this desire for god. Like, say, Hindu’s, or animists, or secular humanists. I mean, if beauty inspired a longing for a monotheistic father figure in everyone, why aren’t all religions monotheistic? Keller has been taught to interpret the emotions elicited by art as a desire for god, but that’s clearly not the only interpretation of those emotions. So if you believe that a desire for X is evidence that X exists, in the case of this beauty argument, X is not god.
I don’t think art, or beauty, make you desire anything. I think it makes you feel things devoid of usual context, and people can fill that context with whatever they want. Even if you disagree, the notion that wanting something is a clue that it exists is absurd. The whole practice of science has been developed to determine if the things we feel are true (desire to be true), are in fact true, because just feeling it is not sufficient. Further, all the things associated with god are just logical extremes of mundane things that do exist. Like, if God exists, then we live forever. Well, life exists, and we want it, so it makes sense to desire life, but that doesn’t mean infinite life exists. God will dole out perfect justice. As a social animal we have an evolved sense of fairness, and it makes sense to want justice, because it does exist to a certain extent in our society, but that doesn’t mean the perfect justice exists. Just like it makes sense that we get hungry, because food exists, but that doesn’t mean infinite food exists.
Just think of all the things other people desperately want to exist, that you are not at all compelled to believe in. Xenu, Santa, unicorns, bigfoot, Allah, faith healing, fad diets, etc. etc. forever and ever. Why is what you desire any more likely to exist than what I, or Tom Cruise, desire?
This argument was made by believers, for believers. It is designed to make someone who already believes in god feel better about that belief, but anyone who isn’t motivated to accept it uncritically can’t help but see it as nonsense.