Chapter 10 — Part I: The Creed — Article VIII: I Believe in the Holy Ghost
Section 2. On this subject the pastor should omit nothing that study and industry can effect; for on this Article, no less than on those that preceded, ignorance or error would be unpardonable in a Christian. Hence, the Apostle did not permit some among the Ephesians to remain in ignorance with regard to the Person of the Holy Ghost. Having asked if they had received the Holy Ghost, and having received for answer that they did not so much as know that there was a Holy, Ghost, he at once demanded: In whom, therefore, were you baptised? to signify that a distinct knowledge of this Article is most necessary to the faithful.