The Word takes to Himself one man, for He takes unity. He does not take schisms to Himself, nor does He take heresies. … So it is one man who is taken, and his Head is Christ. … This is that "blessed man who hath not walked in the council of the ungodly" (Ps. 1:1); this is he that is assumed. He is not outside of us. … Let us be in Him, and we shall be assumed; let us be in Him, and we shall be chosen. … Therefore this one man that is taken to become the temple of God, is at once many and one.

p.430 - On the Mystical Body of Christ