If I believed that this was my only life, I'd be a monk Right Now, and I'm 20. It would be my only goal to reach Nibbana and live a peaceful, fruitful life with no suffering. Or I would truly live life on the edge and enjoy. I would be making some serious money right now and dating tons of girls if I didn't believe in rebirth. But because I know that my consciousness will be reborn forever, I'm slacking off with my desire to learn Buddhism because I know I can postpone Nibbana for another time. Do you think that rebirth gives less value to life if I'm just going to get more and more chances?
On that note, if anyone can reach Nibbana, why wouldn't I just be a criminal and then later be a monk and reach Nibbana like that serial killer who the Buddha helped reach Nibbana.
I'm not questioning to offend, I'm questioning to learn, just to clarify.
"There are only two mistakes one can make along the road to truth; not going all the way, and not starting."