An Exegetical Work on the Five Points of Calvinism -- Augustus Toplady left and admirable written evaluation of Gill's contribution to the cause of the doctrines of grace. He said, "No man since Augustine has written so largely in defense of the system of Grace, and certainly no man has treated that momentous subject, in all its branches, more closely, judiciously, and successfully, " said Augustus Toplady of Gill. This is a masterful defense of the doctrines of sovereign grace by which Gill refuted the popular Arminian writings of his day.