To make it in any sense an infallible revelation, or in other words a revelation at all, _to us_, we need a power to interpret the testament that shall have equal authority with that testament itself.
Simple as this truth seems, mankind have been a long time in learning it.

Indeed, it is only in the present day that its practical meaning has come generally to be recognised.

But now at this moment upon all sides of us, history is teaching it to us by an example, so clearly that we can no longer mistake it.
That example is Protestant Christianity, and the condition to which, after three centuries, it is now visibly bringing itself.

It is at last beginning to exhibit to us the true result of the denial of infallibility to a religion that professes to be supernatural.

We are at last beginning to see in it neither the purifier of a corrupted revelation, nor the corrupter of a pure revelation, but the practical denier of all revelation whatsoever.