I first heard Johnny Collins sing this, and he blew me away. His remains my favourite performance of it.

This from Google (www.barefootsworld.net, which seems to be an AA site):

"The Master's Hand" was written by Myra Brooks Welch. She was called "The poet with the singing soul." Hers was a very musical family. As a young woman, Myra's special love was playing the organ.

In 1921, she heard a speaker address a group of students. She said she became filled with light, and "Touch of the Master's Hand wrote itself in 30 minutes". She sent it anonymously to her church news bulletin...   Several years later the poem was read at a religious international convention - "author unknown." A young man stood up and said, "I know the author, and it's time the world did too. It was written by my mother, Myra Welch." [...]

What the world did not see was the woman who created these masterpieces: Myra in her wheelchair, battered and scarred from severe arthritis, which had taken away her ability to make music. Instead, her musical soul spoke through her poetry. She took one pencil in each of her badly deformed hands. Using the eraser end, she would slowly type the words, the joy of them outweighing the pain of her efforts... Her talent lay undiscovered prior to her wheelchair days. Rather than becoming bitter, she chose to let her handicap make her better, and a wonderful new door opened for her.