there is no life beyond this world
That may or may not be true. I am leading my life on the assumption or possibility that there may be. If there isn't any, then I'd have lost nothing and lived a good life. It's my fire extinguisher.
Pascal’s Wager means that Pascal was a bad gambler.
A good life—
according to whom?Having lost nothing is at best arguable, whereas some of the major religions define “goodness” in a way that is inimical to life on this Earth. Observe the decline of the Romans—or of the modern world.
I am leading my life on the assumption or possibility that there may be.
How can you do that if you do not know what actions in life reap rewards in afterlife?
In this context, the inevitable answer must be the commandments of some god or another.
Which one? (If any answers that he thinks the answer is obvious, then he has constructed a circular argument that uses his existing beliefs, accepted on faith, as a premise upon which to argue for his beliefs.)
The actions alleged by some to reap rewards in a potential afterlife are generally those which reap rewards in this life.
Summarily: don't be a dick
Not much of a philosopher, are you.