Father, Son, and Holy Spirit: How Do You Understand the Godhead?

@Bruce_Leiter
Institutes of the Christian Religion, John Calvin Book 1, Chapter 13, section 18
Here it is
Book1, Chapter 13, section 18
18. I am not sure whether it is expedient to borrow analogies from human affairs to express the nature of this distinction. The ancient fathers sometimes do so, but they at the same time admits that what they bring forward as analogous is very widely different. And hence it is that I have a great dread of any thing like presumption here, lest some rash saying may furnish an occasion of calumny to the malicious, or of delusion to the unlearned. It were unbecoming, however, to say nothing of a distinction which we observe that the Scriptures have pointed out. This distinction is, that to the Father is attributed the beginning of action, the fountain and source of all things; to the Son, wisdom, counsel, and arrangement in action, while the energy and efficacy of action is assigned to the Spirit. Moreover, though the eternity of the Father is also the eternity of the Son and Spirit, since God never could be without his own wisdom and energy; and though in eternity there can be no room for first or last, still the distinction of order is not unmeaning or superfluous, the Father being considered first, next the Son from him, and then the Spirit from both. For the mind of every man naturally inclines to consider, first, God, secondly, the wisdom emerging from him, and, lastly, the energy by which he executes the purposes of his counsel. For this reason, the Son is said to be of the Father only; the Spirit of both the Father and the Son. This is done in many passages, but in none more clearly than in the eighth chapter to the Romans, where the same Spirit is called indiscriminately the Spirit of Christ, and the Spirit of him who raised up Christ from the dead. And not improperly. For Peter also testifies (1 Pet. 1:21), that it was the Spirit of Christ which inspired the prophets, though the Scriptures so often say that it was the Spirit of God the Father.
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Peace
Sam