This song was written after a D.L. Moody evangelistic meeting in Brockton, Massachusetts. Daniel Towner was the song leader that night in 1886, and he asked the people to share how they had been saved. Several stood and spoke of how certain they felt of their salvation. But then a young man rose and said, "I am not quite sure, but I am going to trust, and I am going to obey."
Towner couldn't forget that testimony. He jotted it down and sent it to John Sammis, who had recently left a career in business to enter the ministry, with the hope that Sammis would find in it the inspiration for a hymn text. Towner was not disappointed.
I don't think you will be disappointed, either.
Just let me know if you would like to received the E9th tab for this song and it would be a joy to me to put it in the mail for you.
May the new year bring you many blessings from the Lord.