Blest Jesus, Source of grace divine. P. Doddridge. [The Water of Life.] This hymn is No. 88 in the Doddridge manuscript, where it is undated. In J. Orton's edition of Doddridge's (posthumous) Hymns, &c, 1755, No. 221, it is given in 4 stanzas of 4 lines, with a text slightly differing from the D.MSS. It is also in J. D. Humphreys's edition of the same, 1839. Its most popular form is that given to it early in the century in some American Unitarian collections:— "Blest Spirit, Source of grace divine." In this form it is in the Unitarian Hymn [and Tune] Book, Boston, 18G8, and other hymnals.
-- John Julian, Dictionary of Hymnology (1907)