Many Christians recognize the name of Augustine of Hippo from his valiant defense of the biblical doctrine of divine sovereignty against the man-centered heresy of the British monk Pelagius. And we know that the Reformers made exceedingly frequent references to Augustine’s work as they fought against the man-centeredness of the Roman Catholic Church. But what many don’t know about Augustine was his consistent emphasis on the centrality of the affections—and particularly joy—in the believer’s life. In fact, he even defined love for God in terms of enjoying Him:
“I call [love to God] the motion of the soul toward the enjoyment of God for his own sake, and the enjoyment of one’s self and of one’s neighbor for the sake of God.” 
It was this pursuit of his own pleasure—indeed, his own pleasure in God Himself—that strengthened Augustine to engage in the many debates and altercations of the Pelagian controversy. When a friend asked him why he even bothered with the polemical disputes, he answered:
“First and foremost because no subject gives me greater pleasure. For what ought to be more attractive to us sick men, than grace, grace by which we are healed; for us lazy men, than grace, grace by which we are stirred up; for us men longing to act, than grace, by which we are helped?” 
For Augustine, there was no dichotomy of “enjoying sovereign grace” on the one hand and “fighting for sovereign grace” on the other. The latter was fueled by the former. The joy of the Lord was his strength (Neh 8:10).