John 7:53: Then Jesus said unto them, Verily, verily, I say unto you, Except ye eat the flesh of the Son of man, and drink his blood, ye have no life in you.
The verse is actually 6:53, and if taken literally like as other "Verily, verily" statements, then besides excluding all who do not believe the Cath. Eucharist from being born of the Spirit, then this would mean that taking part in the Lord's supper was how souls were to be regenerated, which is nowhere seen or preached as interpretive of this statement, vs. believing the words of the gospel which are spirit and life, and thus living by them, which doing was how Christ lived. (Jn. 4:34; 6:57)
Go study this, by the grace of God.