In this interesting passage, Lewis offers his own interpretation of a famously ambiguous Bible verse—“Work out your own salvation with fear and trembling, for it is God who worketh in you”—and in the process, he attempts to bridge the gap between the two main branches of Christianity, Catholicism (which traditionally emphasizes the importance of good works and moral actions) and Protestantism (which traditionally emphasizes the importance of faith and belief in Christ). As Lewis sees it, salvation is largely out of human hands—it is almighty God who decides whether or not humans will be saved. And yet, humans must endeavor…