Isaac Watts was the son of a schoolmaster, and was born in Southampton, July 17, 1674. He is said to have shown remarkable precocity in childhood, beginning the study of Latin, in his fourth year, and writing respectable verses at the age of seven. At the age of sixteen, he went to London to study in the Academy of the Rev. Thomas Rowe, an Independent minister. In 1698, he became assistant minister of the Independent Church, Berry St., London. In 1702, he became pastor. In 1712, he accepted an invitation to visit Sir Thomas Abney, at his residence of Abney Park, and at Sir Thomas' pressing request, made it his home for the remainder of his life. It was a residence most favourable for his health, and for the prosecution of his literary… Go to person page >
Of justice and of grace I sing. I. Watts. [Psalms ci.] Published in his Psalms of David, 1719, p. 258, in 6 stanzas of 4 lines. It is in use in its original form, and as, "Mercy and judgment I will sing," in the Islington Psalms & Hymns, 1862, and as, "Mercy and judgment will I sing," in the Wesleyan Hymn Book, 1875. Although found in these three forms its use is limited.
--John Julian, Dictionary of Hymnology (1907)