"Here he stands, convinced he is one with nature and that there is some grand meaning behind his existence"

I think we can all say that we are one with nature. That there is some grand meaning behind this existence....POSSIBLE...but unprovable.

My question is.....If there's no way to factually prove the existence or non-existence of meaning behind life....then which is the healthier belief? If I HAD to make a choice to believe or not to believe and there's no proof for either perspective....statistically, which viewpoint supports a healthier, happier life? Which is good for me? I'm leaning towards believing in something as a healthier choice.

In Rob's example, the way that someone convinced that life is pointless lives a happier life is in the feeling that they have not been conned or duped, that they are somehow smarter than the believers.