It Came Upon 
The Midnight Clear

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The Reverend Edmund H. Sears wrote this carol in 1849 when he was pastor of a Unitarian Church in Massachusetts. It was published in 1850 in the "Christian Register." The music was adapted from a hymn by composer Richard Willis who studied music in Europe under Felix Mendelssohn.
Information found HERE
 
It came upon the midnight clear,
That glorious song of old,
From angels bending near the earth
To touch their harps of gold:
"Peace on the earth, good will to men,
From heaven's all-gracious King."
The world in solemn stillness lay
To hear the angels sing.

Still through the cloven skies they come
With peaceful wings unfurled,
And still their heavenly music floats
O'er all the weary world;
Above its sad and lowly plains
They bend on hovering wing,
And ever o'er its Babel-sounds
The blessed angels sing.

Yet with the woes of sin and strife
The world has suffered long;
Beneath the heavenly strain have rolled
Two thousand years of wrong;
And man, at war with man, hears not
The tidings which they bring;
O hush the noise, ye men of strife,
And hear the angels sing!

O ye, beneath life's crushing load,
Whose forms are bending low,
Who toil along the climbing way
With painful steps and slow,
Look now! for glad and golden hours
Come swiftly on the wing;
O rest beside the weary road
And hear the angels sing!

For lo! the days are hastening on,
By prophets seen of old,
When with the ever-circling years
Shall come the time foretold,
When peace shall over all the earth
Its ancient splendors fling,
And the whole world give back the song
Which now the angels sing.