The Doctrine of the Trinity is Practical
In the end, the doctrine of the Trinity is eminently practical and the church can benefit much from understanding and modelling its own life, work and relationships after the Trinity. As we understand better the nature of the Trinity – the unity and diversity in the ways God revealed himself to us – we have the opportunity to pattern what we do after God’s design. We are made in the image of God, and so we can live rightly and best only when we mirror in our relationships the relationships true of the eternal God himself. Yes, we are called to be like God in character, but we also are created to be like God in relationship with one another. To miss this is to miss part of the wonder of human life and it stems from failing to see something more of the wonder of God himself. May we see in the Trinity, the Father, Son and Holy Spirit, how their relationships are expressed and may we learn from this something better about how our relationships and work ought to be lived out, for our good and for the glory of his great and triune name.
From Father, Son, & Holy Spirit: Relationships, Roles, & Relevance by Bruce A. Ware.