Song: Christian oldie often runs in my mind

I often have the refrain from this song run through my mind, for decades. However, the refrain I have is usually the slave version that someone sang for me a long time ago, as a child:

"Go tell it on the mountain, over the hill and everywhere, go tell it on the mountain, to let my people go."

http://www.oldielyrics.com/christmas/go_tell_it_on_the_mountain.html

While shepherds kept their watching
Over silent flocks by night,
Behold throughout the heavens,
There shone a holy light:

Go, Tell It On The Mountain,
Over the hills and everywhere;
Go, Tell It On The Mountain
That Jesus Christ is born.

The shepherds feared and trembled
When lo! above the earth
Rang out the angel chorus
That hailed our Saviour's birth:

Go, Tell It On The Mountain,
Over the hills and everywhere;
Go, Tell It On The Mountain
That Jesus Christ is born.

Down in a lowly manger
Our humble Christ was born
And God send us salvation,
That blessed Christmas morn:

Go, Tell It On The Mountain,
Over the hills and everywhere;
Go, Tell It On The Mountain
That Jesus Christ is born.

When I am a seeker,
I seek both night and day;
I seek the Lord to help me,
And He shows me the way:

Go, Tell It On The Mountain,
Over the hills and everywhere;
Go, Tell It On The Mountain
That Jesus Christ is born.

He made me a watchman
Upon the city wall,
And if I am a Christian,
I am the least of all.

Go, Tell It On The Mountain,
Over the hills and everywhere;
Go, Tell It On The Mountain
That Jesus Christ is born.