Indeed, this practical insufficiency of natural theism is borne witness to by the very existence of all alleged revelations.
For, if none of these be really the special word of God, a belief in them is all the more a sign of a general need in man.

If none of them represent the actual attainment of help, they all of them embody the passionate and persistent cry for it.
We shall understand this more clearly if we consider one of the first characteristics that a revelation necessarily claims, and the results that are at this moment, in a certain prominent case, attending on a denial of it.

The characteristic I speak of is an absolute infallibility.

Any supernatural religion that renounces its claim to this, it is clear can profess to be a semi-revelation only.

It is a hybrid thing, partly natural and partly supernatural, and it thus practically has all the qualities of a religion that is wholly natural.
In so far as it professes to be revealed, it of course professes to be infallible; but if the revealed part be in the first place hard to distinguish, and in the second place hard to understand--if it may mean many things, and many of those things contradictory--it might just as well have been never made at all.