I've written this before, but never quite so well. So I'm reposting this from a comment I made on Public Catholic . The comment is so general, the topic so important, it deserves a posting of its own. The special thing about Catholic morality for me, the one sentence that brought me back out of atheism and Buddhism, the one thing that makes Catholicism absolutely unique among all the world's religions, can be found explicitly in the first two sections of the English translation of the Vatican II document Nostra Aetate. Hints of it can be found before, it's the reason St Irenaeus used the greek word Katholikos to describe his flock ~1900 years ago, it may even be explicitly written out elsewhere in more ancient languages, but the whole idea of following Truth even when it leads us to paradoxes, even when it leads us to messy solutions, is *extremely* important, and exists in no other system of thought that human beings have come up with. Even science excludes some f...