There is nothing from outside a man which, by entering into him, is able to defile him. But the things which procede from a man, these are what pollute a man.
And he said to them: "You know how abominable it would be for a Jewish man to be joined with, or to be added to, a foreign people. But God has revealed to me to call no man common or unclean.
All things are clean to those who are clean. But to those who are defiled, and to unbelievers, nothing is clean; for both their mind and their conscience have been polluted.
Do not be led away by changing or strange doctrines. And it is best for the heart to be sustained by grace, not by foods. For the latter have not been as useful to those who walked by them.