"On our view of morality we can defend only nearly absolute principles. But a theist can believe that strictly absolute variants of these are commanded by God, and that we both must and can safely obey them even when from the point of view of human reason the case against doing so seems overwhelming: we can rely on God to avert or somehow put right the disastrous consequences of a 'moral' choice. But though a theist can believe this, it would gratuitous for him to do so without a reliable and explicit revelation of such absolute commands."