Chapter 10 — Part I — Article VIII (Of the Holy Ghost)
Section 241. Q. Whence know we that the Holy Ghost proceedeth from the Father? A. This we know from the following words of Jesus Christ himself: But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth, which proceedeth from the Father, he shall testify of me. John xv. 26.