From An Essay on the Development of Christian Doctrine
by Venerable John Henry Newman, C.O.

The common sense of mankind does but support a conclusion thus forced upon us by analogical considerations. It feels that the very idea of revelation implies a present informant and guide, and that an infallible one; not a mere abstract declaration of Truths unknown before to man, or a record of history, or the result of an antiquarian research, but a message and a lesson speaking to this man and that. This is shown by the popular notion which has prevailed among us since the Reformation, that the Bible itself is such a guide; and which succeeded in overthrowing the supremacy of Church and Pope, for the very reason that it was a rival authority, not resisting merely, but supplanting it. In proportion, then, as we find, in matter of fact, that the inspired volume is not adapted or intended to subserve that purpose, are we forced to revert to that living and present Guide, who, at the era of our rejection of her, had been so long recognized as the dispenser of Scripture, according to times and circumstances, and the arbiter of all true doctrine and holy practice to her children. We feel a need, and she alone of all things under heaven supplies it. We are told that God has spoken. Where? In a book? We have tried it and it disappoints; it disappoints us, that most holy and blessed gift, not from fault of its own, but because it is used for a purpose for which it was not given. The Ethiopian's reply, when St. Philip asked him if he understood what he was reading, is the voice of nature: "How can I, unless some man shall guide me?" The Church undertakes that office; she does what none else can do, and this is the secret of her power.