I’m really happy with this one! There’s a moment at the end where I tack an extra coda, but it worked out well. Especially since I changed the tonality of the chant from phrygian to Major (much like Bach did for O Sacred Head). What I particularly like about this improv is that it bridges the aspects of the Psalm 89 (88) which reads:
My faithfulness and mercy will be with him;
through my name his horn will be exalted.
I wasn’t particularly ‘horning’ a theme, but the rather adding another layer. That’s what the swell with the celeste and viole do. Add to that the particular chant mode and I think it turns into something profound. Or at least, I like to think it does. Enjoy!