A wonderful Christmas hymn written by the Baptist English newspaper editor James Montgomery in 1816. Over the years, the lyrics have been sung to different tunes.
One verse I like:
Sages, leave your contemplations,
Brighter visions beam afar;
Seek the great Desire of nations;
Ye have seen His natal star.
I am no sage, but I am happy to escape my contemplations to view a brighter vision. The lyrics and a midi of the music here.