6:60–62. Many of his listeners find the eucharistic mystery completely incomprehensible. Jesus Christ requires his disciples to accept his words because it is he who has spoken them. That is what the supernatural act of faith involves—that act “whereby, inspired and assisted by the grace of God, we believe that the things which he has revealed are true; not because of the intrinsic truth of the things, viewed by the natural light of reason, but because of the authority