"There are two angels that attend unseen Each one of us, and in great books record Our good and evil deeds. He who writes down The good ones, after every action closes His volume, and ascends with it to God. The other keeps his dreadful day-book open Till sunset, that we may repent; which doing, The record of the action fades away, And leaves a line of white across the page. Now if my act be good, as I believe it, It cannot be recalled. It is already Sealed up in heaven, as a good deed accomplished. The rest is yours."

Source: Henry Wadsworth Longfellow (1856). “Poetical Works by Henry Wadsworth Longfellow: Illustrated with Upwards of One Hundred and Sixty Engravings on Wood, from Designs by Jane E. Benham, Birket Foster, Etc”, p.388