Since reason is the faculty which analyses and perfects the rest, and it ought itself not to be unanalysed, by what should it be analysed? for it is plain that this should be done either by itself or by another thing. Either, then, this other thing also is reason, or something else superior to reason; which is impossible. But if it is reason, again who shall analyse that reason? For if that reason does this for itself, our reason also can do it. But we shall require something else, the thing, will go on to infinity and have no end. Reason therefore is analysed by itself.
