[In 1886] Mr. [Dwight] Moo­dy was con­duct­ing a ser­ies of meet­ings in Brock­ton, Mas­sa­chu­setts, and I had the plea­sure of sing­ing for him there.

One night a young man rose in a tes­ti­mo­ny and said, I am not quite sure…but I am go­ing to trust, and I am going to obey. I just jot­ted that sen­tence down, and sent it with the lit­tle story to the Rev. J. H. Sam­mis, a Pres­by­ter­ian min­is­ter. He wrote the hymn, and the tune was born.

Daniel Towner

https://youtu.be/4dh02OnJpIE

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Mike