As those to be baptized are splashed by or are plunged into water three times, we hear named the God who is Holy Trinity, the Three-in-One. But this naming is not about math. Nor is it about a desiccated doctrine that does not matter in everyday life. Trinity is about the reality of right relationships, not just among the "Persons" of Father, Son, and Spirit, but of God's relationship with us and our relationship with God, each other, and all of God's creation. These relationships are wrapped up in the doctrine of what theologian Catherine Mowry LaCugna called, "The Practical Trinity," [The Christian Century, (June 15-22, 1992): 268-272.] We know this Triune God in our very concrete, practical lives, in our everyday experience of being part of creation that was loved into being and continues to be sustained in that love.