Deissman on Colossians

While reading through Alexander Maclaren's commentary on Colossians and Philemon, I found that someone had scribbled this quote on the inside of the front cover:

"When I open the chapel doors of the Epistle to the Colossians it is as if Johann Sebastian himself sat at the organ."
- A. Deissmann.

Does anyone know if this is an agrapha of Deissman or does it come from a written source?