How are we the Body of Christ?

From Anonymous, "To Become Orthodox You Have to Make a Paradigm Shift":

[A]s the New Testament teaches, there is a real (ontic) unity of worshipers with Christ through their sharing His uncreated Life and Energies (Grace), in which His goodness and all that He has done for humanity’s sake is shared by His members. This is called Divinization (Théosis); it differs from a pagan Deification (Apothé­osis) in not involving a union of essences.