This morning I began a Sunday School series exploring the doctrine of the Trinity using as a base line Michael Reeves's book, Delighting in the Trinity (IVP Academic, 2012).
As to the question of the relevancy of the doctrine of the Trinity I was greatly moved by Prof. James Torrance's concluding anecdote in answer to Bruce Smith's question: What one thing would you have to say to our troubled world, our disturbed homes, and distressed individuals? Torrance's answer begins at 17:02
and lasts for about 6 minutes. In short, "we don't throw people back upon themselves." Rather, in so many words we introduce them to the Triune God - Father, Son and Spirit. Listen, it is worth your time.