If I found a key on the road, and discovered it fit and opened a particular lock at my house, I would assume most likely that the key was made by the lock maker. And if I find set of teachings set out in pre-modern oriental society that has proven itself of such universal validity that it has fascinated and satisfied millions of people in every century, including the best minds in history and the simplest hearts, that it has made itself at home in virtually every culture, inspired masterpieces of beauty in every field of art, continues to grow rapidly and spread and assert itself in lands where a century ago the name of Jesus Christ was not even heard; if such teaching so obviously fits the locks of so many human souls, in so many times and so many places, are they likely to be the work of a deceiver or a fool? In fact it is more likely that they were designed by the Heart Maker…
—G.K. Chesterton (as quoted by Dr. Timothy Keller)