The Trinity: An Introduction

What we find in later Trinitarian creeds, confessions, and doctrinal summaries are not improvements upon a latent or undeveloped biblical Trinitarianism but, rather, the church's attempt to fathom the depth of the riches of biblical Trinitarianism for the sake of various liturgical, pedagogical, and polemical ends. Some of the church's creeds, confessions, and doctrinal summaries represent such faithful expressions of scriptural teaching and enjoy such wide-ranging ecclesiastical consensus that we dare not transgress the lines they have drawn. Rather, taking them on our own lips, we gladly join the church's chorus of Trinitarian praise.

WHAT'S THE TRINITY: AN INTRODUCTION ABOUT?
It's kind of there in the title, right? This is an introduction to the classical Christian doctrine of The Trinity. He's not trying to re-invent the wheel, he's definitely not trying to innovate, but to provide a concise (it's a Short Study, after all) jumping-off point into deeper studies by providing a solid foundation.

He spends two chapters looking at the primary Biblical texts demonstrating the Doctrine. Chapter 3 is about the Simplicity of God—something too many overlook in a discussion of The Trinity. The following three chapters each focus on a Person of the Trinity. The final chapters are about the “external works” of the Trinity, the “appropriation” of specific works to particular persons, the beneficiaries of God's work, and assorted topics.

All of that is a lot to ask of 133 short pages. Swain pulls it off by being concise, but he never seems to be leaving out details or avoiding the complicated ideas (although he obviously has to).

TOUCHING ON CONTROVERSY
This isn't a polemical work—Swain is here to inform and educate, not combat. Still, he does talk about some Christological errors, including the contemporary dust-ups over EFS/ERAS—Eternal Functional Subordination/Eternal Relations of Authority and Submission.

Swain briefly (again, it's a Short Study) addresses this error. He's calm, he's fair, yet he's firm. It's one of the best short treatments of the controversy I've seen, and in the context of the larger discussion of the Person of the Son as well as the larger discussions of each of the Persons, it's incredibly helpful. It also fits where he put it and doesn't seem like Swain used the opportunity as a digression just to beat a pet theological peeve.

HELPFUL SUPPLEMENTAL MATERIAL
Maybe it's just me, but I rarely find the post-text material all that helpful. This book was one of the pleasant exceptions—there's a brief glossary of some of the technical terms. Also, the “Further Reading” suggestions look great and my “To Buy” list grew a bit.

SO, WHAT DID I THINK ABOUT THE TRINITY: AN INTRODUCTION?

Because the persons of the Trinity are internal to God's life, not external works of God, we can know the persons of the Trinity, as well as their ultimate plan for creation (Eph. 3:9), only if they stoop down and open up the depths of their inner life to us. Only the persons of the Trinity know the persons of the Trinity. Therefore, only the persons of the Trinity can make known the persons of the Trinity. The revelation of the Trinity is a matter of divine self-revelation, divine self-presentation, divine self-naming.

revealed