Christianity traditionally teaches that God is a single being who exists as three eternally distinct persons, Father, Son, and Holy Spirit. Christians today often neglect this teaching in one of two ways: either we are fascinated with it as a kind of strange math problem about how God could be both one and three, or we ignore shrug our shoulders and it plays no significant role in our understanding of our salvation or our day to day lives. But a proper understanding of what it means for us to say that God is Triune should lead us to recognize our God as a God of protest. The way that the Trinity matters is inseparable from the confession and commitment that Black Lives Matter.