What animal contemplates a life after death? None. What animal contemplates the purpose of its own existence, or humility, or developing meds to protect its progeny, or the solar system, or immigration?
You sell yourself too short.
It's a good excuse to justify a life of self gratification.
No, you are the one selling non-believers short. Just because non-believers do not believe in an invisible spirit that will punish bad behavior (or just a lack of faith, depending on the mythos) for all eternity, that in no way justifies bad behavior. If anything, they serve to an opposite belief. After all, there is not preordained plan, supervised by a supernatural being to make sure everything is going to work out. If, because of your actions, things go poorly, there is no one to pray to to make things better. Further more, this is your one and only life. If you screw it up, you don't get another one in the "after life". One shot, with no reset button. Consequently this means we have more, not less responsibility then the believer to make the most of this life and not screw things up for everyone else.
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell
