This has always been one of my favorite hymns. It's usually sung in the Lutheran church during Lent, but it's a powerful and moving reminder of the "bottom line" of our spiritual life any time of the year.
It's sung here by a talented young woman who calls herself "The Lutheran Warbler." You may recognize St. Paul's own confession in 1 Timothy 1:15: "This is a faithful saying and worthy of all acceptance, that Christ Jesus came into the world to save sinners, of whom I am chief" (NKJV).
May you be edified and blessed by this hymn, as I have been repeatedly over the years.