In this barren wasteland of books on the Trinity there are only a few oases out there. If you believe Michael Reeves, and I suspect you should, this is thanks to Schleiermacher who basically treated the Trinity as extraneous to Christianity. In Michael Reeves’ Delighting in the Trinity: An Introduction to the Christian Faith he treats the Trinity as the hub upon which all of Christianity turns. That is part of what makes this particular volume on the Trinity unique. He explicitly states and develops this as a steady drumbeat in the book.
“For God is triune, and it is as triune that he is so good and desireable.”
In part, the book is an apologetic for Christianity in general and the Trinity in particular. He spends some time examining what happens if you don’t have a Trinity, what does that mean about God. To put it simply, God is not love. He is wanting a creation, if he wants a creation that serves him. But if God is love, and there are more than 3 persons in this eternal community of love we understand creation (and redemption) as an overflow of the love they have for one another. This sets Christianity into a different light, a greater light.
“Before he ever created, before he ever ruled the world, before anything else, this God was a Father loving his Son.”
For instance, love is the motive for the mission of God. I am currently reading a book on that subject and the author of this otherwise good book seems to neglect this as the reason. He’s not seeing the mission as the Father sending the Son to adopt more children, but more a Creator wanting to be obeyed. This focus on God as loving community helps to clear the air of many misconceptions and present a more winsome Christianity.
“He creates as a Father and he rules as a Father; and that means the way he rules over creation is most unlike the way any other God would rule over creation.”
For instance, in the last chapter he explores how this focus influences how we view various attributes of God. God’s holiness, for instance, is that he is separate from us in that he loves. In Leviticus 19, he reminds us, that the call to be holy, or perfect, as he is is surrounded by the command to love your neighbor as yourself and explanations of what that looks like (caring for the poor, for instance). So our holiness is not to be mere obedience. Our holiness is to be a love that reaches out to others as God has reached out to us in order to meet the needs of others. Oh, there is obedience but as Jesus said in John’s Gospel this is because love Him who first loved us.