The supernaturalist alleges that religion was revealed to man by God, and that the form of this revelation is a sacred book.
The rationalist alleges that religion was evolved by slow degrees and by human minds, and that all existing forms of religion and all existing "sacred books," instead of being "revelations," are evolutions from religious ideas and forms and legends of prehistoric times. It is impossible to reduce these opposite theories to a common denominator.
The Christians, the Hindoos, the Parsees, the Buddhists, and the Mohammedans have each their "Holy Bible" or "sacred book." Each religion claims that its own Bible is the direct revelation of God, and is the only true Bible teaching the only true faith. Each religion regards all the other religions as spurious.
The supernaturalists believe in miracles, and each sect claims that the miracles related in its own inspired sacred book prove the truth of that book and of the faith taught therein.
No religion accepts the truth of any other religion's miracles. The Hindoo, the Buddhist, the Mohammedan, the Parsee, the Christian each believes that his miracles are the only real miracles.
The Protestant denies the miracles of the Roman Catholic.
The rationalist denies all miracles alike. "Miracles never happen."
The Christian Bible is full of miracles. The Christian Religion is founded on miracles.
No rationalist believes in miracles. Therefore no rationalist can accept the Christian Religion.
If you discard "Creation" and accept evolution; if you discard "revelation" and accept evolution; if you discard miracles and accept natural law, there is nothing left of the Christian Religion but the life and teachings of Jesus Christ.