Why should I fear the darkest hour? J. Newton. [Jesus All and in All.] Printed in the Gospel Magazine, June, 1771 in 8 stanzas of 3 lines, headed "In uno Jesu omnia," and signed "Omicron." It was included in the Olney Hymns, 1779, Bk. iii., No. 46, with the heading “Jesus my All." It has passed into a large number of hymn-books both old and new. It is usually abbreviated.
--John Julian, Dictionary of Hymnology (1907)