Of all orthodox Christian doctrines, the trinity is perhaps the one which most languishes understudied and underappreciated. Many of us see it as a baffling paradox, a riddle without an answer. Only of interest to egg-headed nerds and without any practical application to day-to-day Christian life. But have we been getting this wrong all along? Could reflecting on what it means to say we believe in one God in three persons actually unlock a whole raft of insight and appreciation for not just who our God – Father, Son and Spirit – but also lots of other elements of Christian belief and practice?