3.  But lest any from lack of learning, should suppose from the different titles of the Holy Ghost that these are divers spirits, and not one and the self-same, which alone there is, therefore the Catholic Church guarding thee beforehand hath delivered to thee in the profession of the faith, that thou “believe in one Holy Ghost the Comforter, who spake by the Prophets;” that thou mightest know, that though His names be many, the Holy Spirit is but one;—of which names, we will now rehearse to you a few out of many.