FZ, excellent point, the key word being capable. Every human being on the face of the planet is capble of understanding. The question is have they? Do they? Will they? There are different levels of understanding, for example. I do not consider that confucious was ever enlightened for the words which were attributed to him. It does not mean he was not, but according to what was brought down, I would say no. To compare his words with the Jesus or some other biblical writers is like comparing a drop of water to the ocean. Yet I would say buddism, Toaism, the American Indians(black elk), South american native understanding, etc... all the equal to the bible all in their purest points. Was he capable yes. Did he do it? From the proof I would say no. So one would have to measure the depth of the underlying statements in order to find the depth of the wisdom, but that would require the observer to have gone to that level to understand the level. The observer may also find non relative wisdom in the expression of the others wisdom even if it is not propagated from that level. This would be reading into the expression, which may or may not been have intended from that point of view.