The divine revelation of the Trinity and the corporal expression of the human body both find a common ground in "self-surrender". This idea was highly sustained by the twentieth century theologian of Basel, Hans Urs von Balthasar. In his thought, the innermost law of the triune love is revealed by the "decline" of each Hypostasis on behalf of the Other. This divine self-surrender is made manifest by the Father's gift of the Son's body for the world through the Spirit. Von Balthasar thinks that this trinitarian Drama is archetypal for the human body's self-surrender, whether this surrender is to the other person as in the case of genuine sexual love (confirmed in his theology of the sexes), or to a spiritual cause as with self-renunciation and final self-surrender to God. I argue that "self-surrender" is an intrinsic biological dimension, that spans to all the stages of life, from the formation of the human embryo to the person's last breath. To understand how this purely biological disposition meets the eternal Mystery, one must consider the distinction, offered by the German language, between the mortal and "transitory" body (Körper) and the vital body (Leib). The Swiss theologian further demonstrates that the permanent scars of Christ's Resurrection body (Leib) and his eucharistic meal tell eloquently the reciprocity in which even the corporal human body (Körper) is involved. My paper will present the remote sources of this theory, that is, the ideas of four great medieval and modern mystics that inspired von Balthasar: Meister Eckhart, Ruysbroeck, John of the Cross, and Teresa of Àvila. I will then move from the historical approaches to the theological promises I find in these reflections.