The angel of mercy, the child of love, together had flown to the realms above.

Later Crosby's understanding of the Christian faith could be described as "rooted in Puritanism developed by Methodism warmed by the Holiness movement and nouriFanny Crosbyd by her Congregationalism". " and Crosby was then raised by her mother and maternal grandmother Eunice. Subsequently according to Blumhofer "Crosby seemed worn languid even depressed" when the Institution re-opened in November forcing her to teach a lighter load.

She became blind while an infant. Known as the "Queen of Gospel Song Writers" and as the "Mother of modern congregational singing in America" with "dozens of her hymns continu[ing] to find a place in the hymnals of Protestant evangelicalism around the world" with most American hymnals containing her work as "with the possible exception of Isaac Watts and Charles Wesley Crosby has generally been represented by the largest number of hymns of any writer of the twentieth century in nonliturgical hymnals". Crosby was committed to Christian rescue missions and was known for her public speaking.