The Triune God as Speech Event

It's quite fashionable to describe the Trinity as a dance. CS Lewis does in Mere Christianity, and Tim Keller picks up on this in The Reason for God (p.215):

When we delight and serve someone else, we enter into a dynamic orbit around him or her, we center on the interests and desires of the other. That creates a dance, particularly if there are three persons, each of whom moves around the other two [...] Each person of the Trinity loves, adores, defers to, and rejoices in the others. That creates a dynamic, pulsating dance of joy and love. the early leaders of the Greek church had a word for this - perichoresis. Notice our word "choreography" within it. It means literally to "dance or flow around"

That's great, I love it. But I'm also slightly disatisfied. Maybe it's because I don't really like dancing, but despite all that is said about other-centredness and movement it feels slightly self-contained and static to me. Perhaps it's because I see the dance as happening somewhere over there, and "Jesus...inviting you into the dance" (p.221, ibid). Instead I should see the dance as "Jesus moving toward us and encircling us with an infinite, self giving love" (ibid) and then it would be better. But usually the "dance of God" is a description of the triune life apart from the salvation of the world, and I'm increasingly convinced that we mustn't talk about the Trinity apart from that.

In Luther's hymn "Dear Christians, one and all rejoice", Luther imagines the triune life of God not as a dance but as a conversation about the salvation of the world. Oswald Bayer comments on this hymn:

If the Trinity is a dialogue, if God, within himself, is communication, relationship, a relational three-ness, then he does not allow himself to be conceptualized in any way as a monad, as a monarchical being or subject. Instead, within himself he is in motion: speaking and hearing, speaking and answering, as Father and Son, to whom the Spirit listens, so that what is heard can be communicated to us [cf. John 16:13]. Thus the entire being of the triune God is a unique communication to me and to all creatures, an event of complete giving and a trustworthy, reliable promise.

(p.341, Martin Luther's Theology: A Contemporary Interpretation)

I like that more. Although I must make sure it is not my likes and dislikes driving my theology!