Be Thou My Vision

Be thou my vision, O Lord of my heart;
naught be all else to me, save that thou art;
thou my best thought, by day or by night;
waking or sleeping, thy presence my light.

10th Century Irish monastic prayer. [Tune: SLANE]

This is an unusual hymn because the melody line does not repeat at all. Nevertheless, the Irish ballad is quite singable and memorable