Actually that is a quote, and I'm sorry I didn't make that clear. It is the official stance of the Holy See.
Consider:
II. TOTAL AGNOSTICISM SELF-REFUTING
Total or complete Agnosticism--see (2)--is self-refuting. The fact of its ever having existed, even in the formula of Arcesilaos, "I know nothing, not even that I know nothing", is questioned. It is impossible to construct theoretically a self-consistent scheme of total nescience, doubt, unbelief. The mind which undertook to prove its own utter incompetence would have to assume, while so doing, that it was competent to perform the allotted task. Besides, it would be Impossible to apply such a theory practically; and a theory wholly subversive of reason, contradictory to conscience, and inapplicable to conduct is a philosophy of unreason out of place in a world of law.
See more about your agnostic "faith" here:
http://www.newadvent.org/cathen/01215c.htm