Blessed Redeemer, how divine. I. Watts. [Divine Equity.] A hymn on his sermon on St. Matt. vii. 12. It was published in an edition after 1723, of his Sermons on Various Subjects, &c, 1721-3, in 6 stanzas of 4 lines, and headed "The Universal law of Equity." In the older collections it is frequently found, especially the American, but in modern hymn-books it is seldom given, and then in an altered and abridged form.
-- John Julian, Dictionary of Hymnology (1907)