Let say it outright, I don’t know why grace is so amazing. The concept is so overwhelming that we prefer sing about, and not just theorize about it. This choral arrangement by Roger Ames opened a window to heaven for me, specially when the arranger brings the text of the Kyrie Eleison, Lord have mercy, during the piece. Please get your headphones out and listen, or better, sing along and let God heal your heart. We all need this healing.
Listen to it. There’s also another version at this link.