His revelation was to offer us a new covenant. A better one...
And the scripture is, "Nothing taken outwardly in". That is anything you put in your mouth.
NO Need to interpret what it says or put your spin on the sentence...
This quote of Jesus is a direct reference to kosher law and the subject of what defiles, whether food or teaching, bacon or thoughts, etc., Jesus taught that the subject of kosher law was about what goes into and out of the mind. Hence the command to "eat my flesh". This is irrefutable.
If you do not stand guard over the sanctity of your own mind and differentiate between clean and unclean teaching, as the law instructs, you cannot have the life promised for fulfilling the law in you.
"Unless you eat my flesh, accept my teaching, and drink my blood, do it, you can have no life in you."
You have set this instruction aside, or never heard of it, and so you have your reward already.