Ahhh Pascal's Wager. I used to use that apologetic but often the secularist will respond with the Atheist wager which follows the format (from Wikipedia).
"One version of the Atheist's Wager suggests that since a kind and loving god would reward good deeds – and that if no gods exist, good deeds would still leave a positive legacy – one should live a good life without religion.[1][2] Another formulation suggests that a god may reward honest disbelief, a reward which would then be jeopardized by a dishonest belief in the divine.[3]"
As I see it, when God quickens the soul of man, good works follow from the motive of gratitude and love for the blood He shed successfully atoning for His elect, cancelling the certificate of debt at the Cross no less. We do not attempt to obey from the motive of legal fear of judgment for we can never meet the righteous requirement of the law.
Yes, the soul that sins shall die. Just one sin and, through one man's transgression (Adam) we died. How glorious it is that through one man's righteousness, the second Adam, those that are granted repentance will live! Christ alone obtained immortality for His elect. It is finished.
Therefore, I will urge you to reconsider appealing to reward/punishment as your apologetic but rather preach Christ crucified and the truth thereof. Those who are granted ears to hear will be converted and thereafter obey for the motivation of love and to give God ALL the glory due Him.
Nevertheless, thanks for the post. It got the ol' hamster wheel spinning in my mind and reminded of a time ago. I'm more inclined to presuppositional apologetics at the moment.