Within reality there are five divisions. The first is between uncreated nature and the created nature that acquires existence through coming into being. Second, the created nature that receives its existence from God is divided into the intelligible and the sensible. Third, within sensible or visible nature there is a division between heaven and earth. Fourth, earth is divided into paradise and the world. Fifth, man is divided into male and female.
Now man is, as it were, a workshop that contains everything in an all-inclusive way; and by virtue of his nature he acts as mediator, endowed with full power to link and unify the extreme points at the five different levels of division, because in the various aspects of his nature he is himself related to all these extremes. It is thus his vocation to make manifest in his person the great mystery of the divine intention–to show how the divided extremes in created things may be reconciled in harmony, the near with the far, the lower with the higher, so that through gradual ascent all are eventually brought into union with God.
That is why man was introduced last of all into the creation, as a natural bond of unity, mediating between all divided things because related to all through the different aspects of his own self, drawing them all to unity within himself, and so uniting them all to God their cause, in whom there is no division.
Through dispassion he transcends the division between male and female. Through the holiness of his life he unites heaven and earth, integrating the visible creation. Then, through his equality with the angels in spiritual knowledge, he unifies the intelligible and the sensible, making all created things into one single creation. Finally, in addition to all this, through love he unites created nature with the uncreated, rendering them one through the state of grace that he has attained. With the fullness of his being he coinheres fully in the fullness of God, becoming everything that God himself is, save for identity of essence.
(St. Maximus the Confessor, from The Time of the Spirit, p. 27)