Book of Hymns for Public and Private Devotion (fifteenth edition)
Be Thou, O God, by night, by day,
My guard, my guide from sin,
My life, my trust, my light divine,
To keep me pure within.
Pure as the air, when day’s first light
A cloudless sky illumes,
And active as the lark that soars
Till heaven shines round its plumes.
So may my soul, upon the wings
Of faith, unwearied rise,
Till at the gate of heaven it sings,
’Midst light from Paradise.