Great Source of life, our souls confess. P. Doddridge. [Thanksgiving for Personal Benefits.] This hymn is No. 10 in the "D. MSS." but is undated. It is in 5 stanzas of 4 lines, and entitled, "Of walking before the Lord in the land of the living," Psalm cxvi. 9. The same text was given in his (posthumous) Hymns, &c, 1755, No. 59, but the title was changed to, "Deliverance celebrated and good resolutions formed"; and again in J. D. Humphreys's edition of the Hymns, &c, 1839, No. 72. In some modern collections stanza ii. is omitted, as in Mercer's Church Psalter & Hymn Book, edition 1864, No. 507. Usually, however, it is given in full.
--John Julian, Dictionary of Hymnology (1907)