This dissertation examines Gregory of Nyssa's conception of the human body as the medium of interpersonal connections, which we might call the corporate nature of the human body. Previous scholarship on Gregory's teaching of the body has correctly pointed out that Gregory often views the body in the post-fallen state as sinful — its impulses often need to be restrained by the soul in a human person's ascent toward union with God. An overemphasis on this aspect of Gregory's teaching has, however, somewhat obscured the fact that the bishop of Nyssa genuinely appreciates the value of embodiment'in particular, he emphasizes that the body constitutes an indispensable medium through which an individual person is connected to other human beings, including Christ, the God incarnate.The corporate nature of the human body is a prevalent theme in the corpus of Gregory of Nyssa, notably in his theological anthropology, soteriology, and ecclesiology. Chapter 1 examines Gregory's teaching on sexual organs as the medium through which humanity reaches its divinely ordained number (pleroma) in the course of the post-fallen human history. Chapter 2 traces Gregory's account of the human body as the medium of interpersonal communications. Gregory observes that the construction of the human body renders speech possible, which manifests the thoughts in the mind. In a broader sense, Gregory notes that our bodily actions and manners are effective expressions of our inner virtues and vices. Chapter 3 demonstrates that the body of Christ constitutes the crucial medium through which the salvation of Christ is transmitted to other human beings. Gregory maintains that the Logos, by becoming incarnate, has become the perfect embodiment of virtues for others to imitate. Besides, the salvific grace of Christ is conveyed to other human beings through a bodily encounter in the sacraments of baptism and the Eucharist. Chapter 4 examines Gregory's conception of the Church as the mystical body of Christ. Just like different members of a physical body minister to the need of the soul with different functions, the various members of the Church are unified in the service of Christ with the roles they play.