“…Be sure to amend carefully [that means edit] in every monastery and bishop’s house the psalms, notes, chants, calendar material, grammars, and the epistles and gospels. For often enough there are those who want to call upon God well, but because of poor texts they do it poorly.”
Here's an experienced editor!
Christy K Robinson, the Editornado
Literary, commercial, and educational editing, proofing, and writing.