If you scan the literature, there’s been a recent boom in scholarship on Jonathan Edwards’ doctrine of the Trinity. If there’s something everyone agrees on nowadays is that whatever else Edwards is, he’s a trinitarian. One other takeaway, though, is that his trinitarianism is at once traditional and innovative.
In his context, pressured by Deists, Subordinationists, and other varieties of anti-trinitarian theologians, he sought to defend and deliver the doctrine of the Trinity to his people. He aimed to show both that it was fitting with the best speculative, idealistic philosophy of the day, but more importantly that it was the plain teaching of Scripture. (Though, it’s good to note Edwards’ readiness to blend the two is somewhat unique since most Reformed Scholastics shied away from the speculative moves developed by some of the Fathers and the Medievals, preferring to focus on exegetical defenses of the doctrine.)
This comes out clearly in his originally unpublished Discourse on the Trinity. While a good chunk of it is dedicated to parsing theological and philosophical analysis of persons, ideas, and so forth, the bulk is concerned with demonstrating the Scriptural foundations of his view. Edwards opines, “I think the Scripture reveals a great deal more about it than is ordinarily taken notice of.”
One place this comes out is in his treatment of the Holy Spirit. Edwards could be considered a broadly Augustinian theologian of the Trinity here. Augustine famously developed a number of psychological triads in De Trinitate. Taking his cue from man being made in the image of God (Gen. 1:26), he takes the rational soul as the closest (dark) mirror of the Godhead in the world (7:12; 12.6-7). Augustine then proposes three mental triads on the basis of God being love (1 John 4:8). First, he posits that love needs a lover, beloved, and love itself (8:12-14). Second, in the activities of the mind remembering, understanding, and loving itself (10:17-18). Third, and this was his favored analogy, the mind’s ascent in wisdom to remembering, understanding, and loving God (14:15, 25).
Edwards’ formulation most closely resembles the triad of Book 9, but with modifications due to his different metaphysics and context. The thing to note, though, is that in both Augustine and Edwards, the Holy Spirit is identified with the love of God, especially as its understood as the mutual love of the Father and the Son. In their work The Trinitarian Theology of Jonathan Edwards (106), Steven Studebaker and Robert Caldwell identify key components of the model:
Five elements tend to characterize the Augustinian mutual love tradition in its various historical expressions. These characteristics form a fivefold gestalt. These are: 1.) the use of mental triads or the operations of the rational soul to illustrate the Trinity, 2.) the Father as the unbegotten, 3.) the generation of the Son as the Word, 4.) the procession of the Holy Spirit as the mutual love of the Father and the Son, and 5.) the reciprocity between the economic missions and the immanent processions of the divine persons.
Here’s Edwards stating the doctrine positively:
The Godhead being thus begotten by God’s having an idea of himself and standing forth in a distinct subsistence or person in that idea, there proceeds a most pure act, and infinitely holy and sweet energy arises between the Father and the Son: for their love and joy is mutual, in mutually loving and delighting in each other. Prov. 8:30, “I was daily his delight, rejoicing always before [him].” This is the eternal and most perfect and essential act of the divine nature, wherein the Godhead acts to an infinite degree and in the most perfect manner possible. The Deity becomes all act; the divine essence itself flows out and is as it were breathed forth in love and joy. So that the Godhead therein stands forth in yet another manner of subsistence, and there proceeds the third person of the Trinity, the Holy Spirit, viz. the Deity in act: for there is no other act by the act of the will.
Now, we can’t get into all the details about how Edwards’ idealism has inflected the whole account, but you see the basic elements in play here: the psychological analogy, the Father unbegotten, the generation of the Word, the Spirit as mutual love of Father and Son, and so forth.
Whether consciously or not, Edwards also follows some of Augustine’s key, exegetical moves, including his focus on 1 John 4. (On which, see Matthew Levering, “The Holy Spirit in the Trinitarian Communion: ‘Love’ and ‘Gift’?” IJST Volume 16 Number 2 April 2014, 126-142.) Edwards suggests the “Godhead or the divine nature and essence does subsist in love” is confirmed in the statement of 1 John 4:8, “God is love.”
But he argues that verses 12-13 in the same chapter “plainly” suggest to us that love is the Holy Spirit, since they read, “If we love one another, God dwelleth in us, and his love is perfected in us. Hereby we know that we dwell in him, because he hath given us the Spirit.” For Edwards, it is clear that the apostle John has identified the love of God in us as God’s dwelling with us, which happens by the Spirit’s dwelling within us. This “confirms not only that the divine nature subsists in love, but also that this love is the Spirit; for it is the Spirit of God by which God dwells in his saints.”
Edwards finds this logic confirmed in dozens of texts (Rom. 5:5; Phil 2:1; 2 Cor. 6:6; Col. 1:8), the name of the Spirit, the work of the Spirit in sanctification, types of the Spirit (oil), symbols of the Spirit (dove), metaphors and similitudes (water, fire, breath, wind, a spring, a river, etc), and so on.
Returning to the Spirit’s work in sanctification, Edwards says that communion with God is to participate in the Holy Spirit:
Communion is a common partaking of good, either of excellency or happiness, so that when it is said the saints have communion or fellowship with the Father and with the Son, the meaning of it is that they partake with the Father and the Son of their good, which is either their excellency and glory, (2 Pet. 1:4, “ye are made partakers of the divine nature;” Heb. 12:10, “that we might be partakers of his holiness;” John 17:22–23, “and the glory which thou hast given me I have given them that they may be one even as we are one I in them and thou in me”); or of their joy and happiness: John 17:13, “that they might have my joy fulfilled in themselves.” But the Holy Ghost, being the love and joy of God, is his beauty and happiness, and it is in our partaking of the same Holy Spirit that our communion with God consists…
Here Edwards moves on to make a very interesting observation that demonstrates how attentive he is to Scripture in these matters. He supposes that this notion that the Spirit is the mutual love of the Father and the Son which is given to believers is the only good account for the fact that Paul (13x!) wishes grace and peace from God the Father and the Lord Jesus Christ, without ever mentioning the Holy Spirit by name. This only makes sense if, “the Holy Ghost is himself love and grace of God the Father and the Lord Jesus Christ.” Or again, in places like John 14:21 and 23, Christ mentions the love of Father and Son for believers, “but no mention is made of the Holy Ghost” or “never any mention of the Holy Ghost’s love.”
Even more strikingly, Edwards notes how Scripture seems to be silent about the love of the Spirit within the Godhead itself:
I suppose to be the reason why we have never any account of the Holy Ghost’s loving either the Father or the Son, or of the Son’s or the Father’s loving the Holy Ghost, or of the Holy Ghost’s loving the saints, though these things are so often predicated of both the other persons.
The only account Edwards can give for Scripture’s silence regarding the Spirit’s mutual love for Father and Son is rooted in the abundance Scripture’s witness regarding the Spirit mutual love of Father and Son.
This isn’t even close to a full account of either Edwards’s exegesis, pneumatology, or his trinitarian theology. What’s more recent works by Kyle Strobel, Oliver Crisp, and others have pointed out, Edwards’s account of the Trinity has some very serious, conceptual oddities. Still, even if one does not follow Edwards in all of his theological maneuvers, it’s clear articulation serves as a model for theologians who believe careful, committed exegesis need not be pitted against speculative, metaphysical reasoning in theology.
More importantly, on the material question of the Spirit as the mutual bond of love, he shows the plausibility and seriousness that should be given it on Scriptural grounds. Recognizing the Spirit as the, “infinitely holy and sweet energy [which] arises between the Father and the Son” need not be a matter of philosophical fancy after all, but rather of God’s own Self-Witness in his Word.
Soli Deo Gloria