From the history book
The author of the hymn based it on the first 6 verses of Psalm 50. The 1950 hymnal had this as a choir hymn. She said it is not one of our easiest hymns. Really?! There may be a lot of moving parts, but it doesn't seem as hard as some others I have seen. But for the current hymnal they did put it in a lower register and added in soprano and alto parts that weren't in a part of it. The 1950 hymnal had a another verse: "Gather first my saints around me, Those who to my covenants stood--Those who humbly sought and found me Through the dying Savior's blood. Blest Redeemer, Dearest Sacrifice to God." I like those! And, this hymn was included in Emma's 1841 hymnal, and in the 1889 Psalmody this was paired with the present tune, by our fabulous Evan Stephens.