Like ALL religious texts it's a story. A set of rules laid down by MEN who lived centuries ago and felt that the world would be better if everybody believed what they were told and followed a certain set of rules that propagated a status quo.
The human brain has an evolutionary need for a belief in a higher power. As children we have invisible friends, a few years later, we have gods.
Sorry but i've had firsthand experience that there are higher powers. For me God isn't something theoretical but something solid and concrete. The same goes for the afterlife. I've seen both heaven and hell and they are real though not quite like most people imagine.
Sure many 'religious' people find security in there faith/books without first hand experience but some people have had firsthand of superior worlds (heaven) and inferior worlds (hell).