"O My Father" (originally "My Father in Heaven",[1] also "Invocation, or The Eternal Father and Mother"[2]) is a Latter-day Saint (LDS or Mormon) hymn written by Eliza R. Snow who felt inspired to write it after Joseph Smith, Jr. had taught her the principle of heavenly parents. The hymn is interesting in terms of Mormon theology in that it is one of the few direct references to a "Heavenly Mother" in materials published by The Church of Jesus Christ of Latter-day Saints.
After discussing pre-mortal existence and a sense of belonging to "a more exalted sphere" in heaven, stanza three reasons that if there is an eternal Father there must also be an eternal Mother:
Snow wrote "O My Father" under the title "My Father in Heaven" in October 1845 in Nauvoo, Illinois. The Times and Seasons first published the words on 15 November 1845, more than a year after Joseph Smith, Jr. was killed.[1] The poetry was later set to the music of another Christian hymn, "My Redeemer" by James McGranahan,[3] and included in Latter-day Saint hymnals, including the current one. When a collection of Snow's poems were published in 1856, this work was placed first in the double-volume set and entitled "Invocation, or The Eternal Father and Mother".[2]