As much as I want to believe in the afterlife, I have a hard time doing so. What fuels this? Mainly a thought I had in fifth grade.
I was in religious class and we were studying ancient religions and the way they pissed off "God" by worshiping a golden calf.
That got me to thinking. While the idea of worshiping a golden calf seems stupid to me now, to the people of that time it made complete and utter sense.
From there, I started thinking about all the customs we have and wondered how they'd be looked at in 200-300 years.
I can't say there's much of a difference.
Also, another thought I've often had. Let's say there is an afterlife. Are there pets there? Sure, everyone might think little Fido or Jewel the cat go to Heaven when they die but what about the everyday rabbit killed in traffic? The ants stepped on by some third grader? The evil shark in the ocean?
If you believe in the afterlife, don't you have to believe that there's an afterlife for all those creatures too? I suppose you could think that humans are just special but, really, what are the odds that there would be one afterlife and just humans are a part of it?
And, lastly, we base almost all of what we know of religion on ancient books written by God through man, right? Well, let's say God decided he wanted to write a sequel today. How would those books be received?
I doubt anyone would seriously consider a new bible written today as factual and would write off anyone crazy enough to say they've talked to God so what makes the guys who wrote thousands of years ago so special? Why should we believe they had actual contact with a deity and that that deity has chosen to go to radio silence ever since?
These are the reasons I can't believe there actually is an afterlife. But I don't begrudge anyone who does believe in one. Heck, I hope there is one. The thought of fading to black with nothing else ever creeps me out beyond belief.