CCC 264
Profession of Faith›SECTION TWO I. THE CREEDS›CHAPTER ONE I BELIEVE IN GOD THE FATHER›Paragraph 2. THE FATHER
"The Holy Spirit proceeds from the Father as the first principle and, by the eternal gift of this to the Son, from the communion of both the Father and the Son" (St. Augustine, De Trin. 15, 26, 47: PL 42, 1095).