Eudaimonia, then, is not joy. It is not “the summit of integral well-being.” It does not fulfill all desire. For we can intelligibly desire what we cannot intelligibly intend, what we cannot bring about through our agency. One of the ways in which Christianity upended pagan thought was in elevating receptivity over activity; if God is our final good, that good is not, contra standard pagan thought “something we can achieve for ourselves.” God is the ultimate, if imperfectly known, object of desire. What we desire is not simply that we be properly responsive to God in and through our agency. More than this, we desire fellowship with God, a participation in perfected relationship with God, one aspect of which is its fruition: the enjoyment of God. Joy is not simply a matter of objective relations; it is intrinsically experiential, an experience of fellowship, of finding fulfillment in God."
Jennifer Herdt, The Task and Gift of Life