Catholic moral theology faces a radical challenge in this age of moral upheaval. No longer must it simply respond to specific questions about particular matter, nor elaborate some method for the formulation of norms. The challenge now is instead no less than comprehending the mystery of human action in its proper dynamism. Livio Melina here guides the reader on a path that seeks to recover the integrality of moral experience and its place in Christian existence. This path aims at rediscovering in moral action an epiphany of love and attempts to help us recognize a profound synergy between human and divine action.