Of all the world's religions, Buddhism relies more on the experience of the believer than any other. Every monk, every believer who ever sets foot on the path to enlightenment must validate the Buddha's insights for himself or herself. Lived experience of the Buddha's teaching is the final test of its validity. Speculation about things that do not touch life directly have no point.
Usefulness is all.
Either the student will experience the truth of the Buddha and move into it, or he or she will leave it behind and seek elsewhere. This doctrine is profound, hard to understand, rare, subtle, only to be understood by the wise. Inc. All rights reserved.