Today is Trinity Sunday on the church calendar. The day is less celebrated than other days of the church year, perhaps because it feels too “theological.” You might even be asking, Does the Trinity matter anymore? I believe it does, and here’s why. God’s triune nature tells us a host of things about God, our world, and about our very selves. As Timothy Keller says, “if this world was made by a triune God, relationships of love are what life is really all about.” So today we talk about what “life is really all about.”