Just remember that none of these things will get you to Chicago. A number of readers wrote in to criticize my explanation. I agree that I could have made my point more clearly. There were three main criticisms. But you could imagine a world in which there were only one way to get to Chicago and that's what the spiritual world is like.
Real roads curve.
Okay, let's speak of directions instead of roads. The spiritual course of an individual's life is often full of curves, but that's because he is changing directions, not because he is consistently following a direction. Although it's true that many of the same moral rules are recognized in all major world religions, that doesn't mean that they all lead to God in the end. We may know God's moral requirements, but by our own unaided efforts we fall infinitely short of them. As I, the Lord, Am Holy.