Keep on reading.
63It is the Spirit who gives life; the flesh profits nothing; the words that I have spoken to you are spirit and are life.
64But there are some of you who do not believe. For Jesus knew from the beginning who they were who did not believe, and who it was that would betray Him.
65And He was saying, For this reason I have said to you, that no one can come to Me unless it has been granted him from the Father.
66As a result of this many of His disciples withdrew and were not walking with Him anymore.
67So Jesus said to the twelve, You do not want to go away also, do you?
68Simon Peter answered Him, Lord, to whom shall we go? You have words of eternal life.
69We have believed and have come to know that You are the Holy One of God.
Refuting the assertion that the Mass is not the body and blood.
But nice try at sliding the topic.