St Gregory Of Nyssa Orthodox Church

If then the Church is Christ’s body, Christ is the Head of the body, forming the countenance of the Church with His own features. Perhaps it is this that the friends of the Bridegroom saw when they were given heart: in her they see more clearly that which is invisible. It is like men who are unable to look upon the sun, yet they can see it by its reflection in the water. So the friends of the Bridegroom see the Sun of Righteousness by looking upon the face of the Church as though it were a pure mirror, and thus He can be seem by His reflection.
St Gregory of Nyssa