Dr. William McKay wrote the hymn, Revive Us Again, in 1863.  He was raised by a very devout mother, but he would have none of it.  It wasn't until a dying man left something behind that astounded the Doctor that he realized the power of God. 
Here is the link to listen to Revive Us Again.  
https://www.youtube.com/watch?v=VN4N7hOMvTk

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