An Explanation of Luther's Small Catechism · Martin Luther
I. HIS PERSON AND NATURE.
I BELIEVE IN THE HOLY GHOST. The Holy Ghost is true God. He is not simply a power or energy of God, but a Person. [Acts 5:3-4] "He proceedeth from the Father and the Son, and with the Father and the Son together is worshipped and glorified." [John 14:26, John 15:26] The Scriptures ascribe to Him divine names, attributes, power, honor, and works. Christ commanded His disciples to baptize men in the name of the Father and of the Son _and of the Holy Ghost_. [Matt. 28:19] The Holy Spirit instructed the prophets and teachers of Old Testament times, [II Peter 1:21] and was poured out upon the apostles on the day of Pentecost. [Acts 2] He inspired the Holy Scriptures. [II Tim. 3:16] He comes into our hearts through the Word of God and the Sacraments.
Text from Project Gutenberg, public domain in the United States.