But better yet is singing this song in church. The Johnson brothers did a great job of writing a song that appeals to a specific time without alienating everyone else. Obviously, the song refers to slavery, but if one were not aware of that beforehand, the song would still be beautiful. They are able to generalize the specific in a great way.
There are a couple hymns that I find very moving. One is the third verse of How Great Thou Art. The last verse of this one is another. Hopefully quoting just one verse won't tick of the Johnson estate. :)