My Hope, my All, my Saviour Thou. [Jesus, All in All.] This hymn has been traced to A Pocket Hymn Book designed as a constant Companion for the Pious, collected from Various Authors. York, B. Spence, 1774 (5th ed., 1786, No. 114), in 5 stanzas of 4 lines. Through this Pocket Hymn Book, which, in a reprint, was the first Methodist hymn book used in America, it came into use in that country. The full and unaltered text is in Dr. Hatfield's Church Hymn Book, N. Y., 1872, No. 964. In the Methodist Episcopal Hymnal, 1878, it is given in 4 stanzas, and ascribed to “Thomas Coke." As the hymn was published in a Methodist Pocket Hymn Book, in 1774, and Dr. Coke did not make the acquaintance of J. Wesley until August 13, 1776, this can hardly be so. Moreover, there is no mention of his having written hymns at that time, or at any time, in Dr. Etheridge's authorised edition of his Life, 1860. We are obliged therefore to say it is Anonymous.
--John Julian, Dictionary of Hymnology (1907)