It is truly amazing that anyone, and specially a blind person, could write on this variety of spiritual truths and experiences with such proliferation. Often the theme for her hymns were suggested by visiting ministers wishing to have a new song in a particular subject. At other times musician friends would first compose the music and then Fanny Crosby for the words.
Such was the case for the hymn "Blessed Assurance." The music for the hymn was composed by Mrs. Joseph Knapp, an amateur musician, and a close personal friend of Fanny Crosby. One day Mrs. Knapp played this melody for the blind poetess and asked, "What does the tune say?" Fanny responded immediately, "what that says: 'Blesses Assurance, Jesus is mine.'
Fanny Crosby died at the age of ninety-five, engraved on Fanny J. Crosby's tombstone at Bridgeport Connecticut, are these significant words taken from our Lord's remarks to Mary, the sister of Lazarus, after she annointed him with fine perfume,