Over the Xmas period, I've been learning about the history of carols. Interesting stuff... Quite a number where written first as poems and then the music was composed. A lot of them were written by people who weren't Christians and that's why some Christians have issues with their theology. O Holy Night was written and composed by an atheist and a Jew. The orginal lyrics are darker and more political. The church banned it being sung in services because of it's "lack of musical taste” and “total absence of the spirit of religion". In the Bleak Midwinter was written by a woman who suffered from depression and hyperthyroidism. The original poem was darker than the carol we sing today. In the 1600's carols were banned for nearly two decades because were viewed as sinful.