This is a curiously affecting old Eucharist hymn that was quite new to me. It has special resonance for Holy Thursday.
The text is by St Thomas Aquinas as translated by Ronald Knox and it is set to SACRIS SOLEMNIS, a Downside melody.
Godsongs has some background here.
I made up chords based on the sheet music and made a backing:
1 Greet we this mystery yearly returning;
Still does its history set our hearts burning;
Gone are the former things, all shall be new again,
Thoughts, words, actions be true again.2 Christ in the sight of his brethren reclining
On that last night of his, gave them for dining
Bread where no leaven was, lamb that was slain for them,
So did Moses ordain for them.3 Thence this unaltering sacrifice fioweth;
Still his unfaltering grace he bestoweth
Where priests do consecrate, worthily taking it,
Then to Christians breaking it.4 Man makes repast in this banquet supernal;
Shadows fade fast in this sunlight eternal;
Wondrous our heritage, Lord, in receiving thee,
Earth’s poor slaves — yet believing thee.5 O gracious Trinity, fill, we implore thee,
With thy Divinity hearts that adore thee;
Dwelling in light, to that light bring us home again,
From thy paths ne’er to roam again.