Pascal's Wager and the Ascetic Ideal

In III, 17 of the Genealogy of Morals, Nietzsche briefly alludes to what is widely known as 'Pascal's wager', but without taking advantage of the opportunity to explain how the entire context stands as a response to that proposition.  The 'wager', from the pioneer of Probability theory, is that to believe in the existence of his God is a risk-free gamble--if that deity does in fact exist, then eternal life is to be gained, but if that deity does not exist, then there is no afterlife, so nothing is lost in believing otherwise.  However, not only #17, but the entire examination of the 'Ascetic Ideal' in part III, exposes what loss is entailed by that religious commitment--one's health prior to death.  So, while Nietzsche might not succeed in reversing the odds of Pascal's wager, he, at minimum, evens them.