The Scottish Composer James MacMillan has drawn on his Roman Catholic faith in much of his musical output, and this has been a significant influence not least on the six operatic works which he has produced to date. These operas, a number of which set libretti by the poet Michael Symmons Roberts, are richly diverse in their scale and in the stories which they present; yet they share a number of themes in common. All of them juxtapose sacred and secular topics, and all are concerned with stories that are both timeless and contemporary. Particularly striking is the fact that all of them draw on liturgy or scripture to give depth and resonance to the stories they tell. These resonances apply both to the characters in the operas and to the audience watching the works in performance. These operatic works therefore have the capacity to prompt theological as well as musical and dramatic reflections in those who experience them.