In order to be united with the Lord and to have eternal life, we must often communicate with His Body and Blood, the source of life. Otherwise, we are not only separated from him, but we are also dead.
But let us not be asleep without deep repentance, heartbreak, pure life, and spiritual preparation, because then the Holy Communion not only does not contribute to our union with Christ but instead condemns and destroys us.
Saint Symeon the New Theologian