What would be really astonishing, in my opinion at least, is that you dreamed up such an argument out of thin air without the realization that no one would do so who received no benefit to the self. Your mistake, in my opinion again, arises out of the fact that you do not have to believe in anything, God or Heaven, because the impetus to do good and to experience the joy of doing it, are characteristic, not of the doubting self you Imagine yourself to be, the product of personal self identification, but of the true self on which that illusion is written.I am not overly familiar with the bible but isnt the gist of that little passage that if you do good with the sole purpose of getting your own ass into heaven... then that voids the ticket?
On the other hand, if someone like ME, that is absolutely certain that there is not heaven, there is no god and when its over, its over... I go forth in the world and do good with no benefit to my self, then in that particular fairy tale *I* get to go to heaven? Hahahahaha .. Isnt that a kick in the nuts to all those unicorn fart loving *'s.
God is where love is and where love is there too is love’s will. To manifest it is to be.