If you can convince me that there is no afterlife and no meaning to life then I might be more likely to give up on life, i.e. take my life. Especially with all the current problems I have in my life, if there's no meaning to life when why should I bother? I can just tell myself that I'm sick of life...
But on the contrary I have gained spiritual and afterlife knowledge and therefore I have a reason to put up with all the negativity in life for the hope that there are actual reasons to live.