accordance with Reason that you should grant My claims? Can you explain
away, _reasonably_, on any other grounds than those which I state, the
phenomena of My life?"

Certainly, then, He appealed to Reason; He appealed to Private Judgment,
since that, up to that moment, was all that His hearers possessed. But,
in demanding an Act of Faith, He appealed to Private Judgment to set
itself aside; He appealed to Reason as to whether it were not Reasonable
to stand aside for the moment and let Faith take its place. And we know
how His disciples responded. _Whom do you say that I am?... Thou art the
Christ, the Son of the Living God._

At that instant, then, a new stage was begun. They had used their Reason
and their Private Judgment, and, aided by His grace, had concluded that
the next reasonable step was that of Faith. Up to that point they had
observed, dissected, criticized, and analyzed His words; they had
examined, that is, His credentials. And now it was Reason itself that
urged them towards Faith, Reason that abdicated what had hitherto been,
its right and its duty, that Faith might assume her proper place.
Henceforth, then, their attitude must be a different one. Up to now they
had used their Reason to examine His claim; now it was Faith, aided and
urged by Reason, which accepted it.

Yet even now Reason's work is not done, though its scope in future is
changed. Reason no longer examines whether He be God; Faith has
accepted it: yet Reason has to be as active as ever; for Reason now must
begin with all its might the task of understanding His Revelation. Faith
has given them, so to speak, casket after casket of jewels; every word
that Jesus Christ henceforth speaks to them is a very mine of treasure,
absolutely true since He is known to be a Divine Teacher Who has given
it. And Reason now begins her new work, not of justifying Faith, but, so
to say, of interpreting it; not of examining His claims, since these
have been once for all accepted, but of examining, understanding, and
assimilating all that He reveals.

III. Turn now to Catholicism.

It is the Catholic Church, and the Catholic Church only, that acts as
did Jesus Christ and offers an adequate object to Reason and Faith
alike. For, first, it is evident that if Christ intended His Revelation
to last through all time, He must have designed a means by which it
should last, an Authority that should declare and preserve it as He
Himself delivered it. And next, i