OH is a lumbering TUNE usually played very slowly, as here. It becomes risible when attached to these words:
All people that on earth do dwell
since the second line is distinctly contradictory:
Sing to the Lord with cheerful voice.
OH is not cheerful. Later the words become repetitive and then acutely genteel:
Praise, laud and bless His name always
For it is seemly so to do
When was the last time you did something seemly?
The tune also accompanies a four-liner also known as the Doxology.
Praise Him from whom all blessings flow,
Praise Him all creatures here below, etc.
The Doxology is not the scientific study of detergent but “a short hymn often added to the end of canticles, psalms, and hymns.”
None of which is very interesting. What is interesting is that you can sing Good King Wenceslas to OH. It’s difficult but possible. Doing so tells you a good deal about how the brain’s cells work for and against your inclinations. Your instinct tells you what you’re doing is wrong, but another set of cells supports this inventive and adaptive act. I urge you to try this. It will cause you to love your brain.