If you want to start a good argument, begin by attempting to explain the Trinity. There is no such word in the Bible as "trinity" but the concept is most definitely there. The trinity is, in short, the God-head made up of the Father, Son, and Holy Spirit; all being God and yet all being uniquely distinct from the other. Reginal Hebner wrote this hymn for liturgical use on Trinity Sunday, 8-weeks after Easter. The emphasis of this hymn was to reaffirm the doctrine of the triune Godhead and to worship him, as such.