8.

 State the textbook's answer to the question, “But if each of the three Persons is distinct, what holds the Trinity together?”

            As stated above, there is one God because there is one Father. The textbook explains that the Father is the cause or source of the Godhead, that He is the principle (arche) of unity among the Three. The Father is born of none and proceeds from none. Both Son and Holy Spirit trace Their origin to the Father: the Son is born of the Father “before all ages,” and the Holy Spirit proceeds from the Father from all eternity.