The spiritual unity of the Church is a primal synthesis willed by God. It is not a relationship that has to be established, but one that is already posited (iustitia passiva), and remains invisible. It is not made possible by concord, similarity or affinity between souls, nor should it be confused with unity of mood. Instead it is real just where seemingly the most intractable outward oppositions prevail, where each man leads his quite individual life, and it is perhaps absent where it seems to prevail most. It can shine more brightly in the conflict between wills than in concord.Dietrich Bonhoeffer, The Communion of Saints, 137 from Dallas Willard, Renovation of the Heart, 186.