 Bill O'Reilly here. You are listening to the best of the O'Reilly Update. The Catholic Church defines marriage this way, quote, a holy sacrament by which a man and woman establish between themselves a partnership for their whole lives and which is ordered by its nature to the good of the spouses and the procreation and education of offspring, unquote. Other religions see it differently, of course, but it's essentially the same thing.