Here is a summary and some thoughts on
What is the Trinity? by Dale Tuggy...
Dale Tuggy is Professor of Philosophy at a State University close to where I live. I have interacted with him a time or two on facebook and visited his website. When I saw he had published a short little book on the trinity, I decided to give it a try.
Introduction
Tuggy believes that most Christians claim to believe in the Trinity, but don't really understand (or understand in contradictory ways) just what it is they claim to believe. In this book, he aims to help us think through the issues by "sticking with the foundational, understandable, and indisputable points."
Chapter 1: Don't be afraid to think about God
Tuggy bemoans that fact that even many serious/mature Christians devote little time to thinking on this subject. He suspects this is due to fear or laziness, but encourages us to dive in. God doesn't want to stay in the dark.
Chapter 2: Formulas vs. Interpretations
The creedal statements, according to Tuggy, are ambiguous and are more question-raising than answer-providing. Since it is unclear what many of the key statements mean, we can't proceed in thinking until they are clarified. It's not enough to just parrot the statement if we don't even truly understand it.
Chapter 3: Trinity vs. trinity
Tuggy believes much confusion would be eliminated (and false-confidence deflated) if we were careful to distinguish between trinity (lower-case, referring to the plural) and Trinity (upper-case, referring to a singular God who simply IS Trinity). He states that, in the 1st three centuries of the church, there was a belief in a triad (trinity), but nothing much like 'God in three Persons' belief in The Trinity.
Chapter 4: The deity of Christ vs. the Trinity
Tuggy says that the deity of Christ need not suggest Jesus is equal to the Father. It is not a building block that necessarily ends in a belief in the Trinity. "The Trinity implies the deity of Christ, but the deity of Christ doesn't imply the Trinity."
Chapter 5: Get a Date
It is not true, says Tuggy, that Christians have always believed in the Trinity. While they have always recognized the trinity (lower-case), the doctrine of the Trinity (upper-case) developed gradually. The term 'God' was generally reserved for the Father. It wasn't until the 4th century that mainstream Christians started talking in Trinitarian terms. And even then, Tuggy says, the consensus was acquired largely by political pressure.
Chapter 6: Persons
Tuggy confesses that it is impossible to ignore the distinction, in Scripture, between Father, Son and Spirit. But we should be careful about any tritheistic conclusions (he's not a fan of social-trinity models) or any model that gives a vague definition of the term 'Person'.
Chapter 7: Substance Abuse
In 325, the Christian council declared that the Father and Son share the same 'ousia' (substance), but what this means was not made clear. The word had at least 9 possible meanings. Tuggy goes through each definition and, basically, concludes that the authors of the creed left things somewhat confused and vague. By 381, belief in The Trinity was more confidently stated (to the chagrin of Tuggy).
Chapter 8: Mystery Mountain
It is common to appeal to 'mystery' when talking about the Trinity. By this many things are meant, but it should never be used as a way to derail conversation about what we actually believe. Tuggy suggests that believers in the Trinity doctrine have worded themselves into a philosophical corner that they can't get out of without admitting they've made a mistake.
Chapter 9: What's a God?
Tuggy presents various ways in which the term 'God' is used. He argues that, biblically speaking, God is one (the Father). There are other deities (in a sense) but the one true God is the Father. Tuggy believes his unitarian position actually has older support from the church and is more biblical.
Chapter 10: Says Who?
Tuggy again expresses concern for why the Trinity doctrine took so long to develop. He suggests that scholars generally won't make the sort of arguments for the Trinity that are often made by apologists and lay-people. We should question their authority and go back to the Scriptures.
Epilogue
Tuggy does believe the correct understanding of the trinity is discoverable. He has concluded that unitarianism is the correct view. Jesus is more accurately (and biblically) described as God's messiah, the Son of Man, and the unique Son of God. In any case, there's a lot of disagreement about the Trinity/trinity. We should run toward those disagreements because doing so helps us to find the truth.
Reaction
I liked this book. I think Tuggy did a good job of clarifying the points of tension in our thinking about the Trinity/trinity. Many of his distinctions may prove helpful for those who read his book and continue to think through these doctrines. I personally found it helpful.
Nevertheless, there are a few areas I would want to push-back on...
First, it seems to bother Tuggy that the doctrine of the Trinity took so long to develop. One gets the impression that this is a point against its accuracy. But I'm not sure why that need be the case. If God is patient and has promised to lead the church into all truth, it should not surprise (or aggravate us) that clarity sometimes arises over time.
Second, throughout the book, Tuggy is critical of apologists for the Trinity. But I wonder if, by the closing chapters, his book couldn't be counted as an apology for the unitarian position. His critique of Trinitarian apologists is that they present a tidier version of their view that fits with reality, but Tuggy's book (by its nature) avoids talking about the nuts and bolts (and apparent weaknesses) of the unitarian position.
Third, in the final statement of the book, Tuggy says that we should begin by asking 'who is the one God?' and then figure out how Jesus relates to him (for Tuggy, the Father alone). However, I think it should be admitted that, biblically, we know the Father best/most through the Son. If we were to start with the Father, we'd have to be doing so largely via philosophy. We must actually start with Jesus to learn best what the Father is like. Starting our theology with Jesus need not demand that we end up with the doctrine of the Trinity, but it is the best way to do theology.
These critiques aside, I really did enjoy (and was helped by) Tuggy's book. I'm personally more inclined toward a 'social-trinity' model, but this book will help me to dig in deeper to think through what I actually mean by that (and what I don't mean). And if I continue to do that... Tuggy has accomplished his goal.