Is the doctrine of the Trinity really meant to be understood? Can it be applied to our everyday lives? Sam Allberry shows us that the Trinity really matters, and that this insight God gives us into himself has enormous implications for how we understand him and how we understand ourselves as beings made in his image. The Trinity shows us that God in his oneness is both unique and perfectly integrated. The relational qualities of his triune nature are eternal and foundational to our understanding of the unity and diversity of the church and the equality of and differences between men and women.