There is nothing from outside a man, that entering into him, can defile him; but the things which come out of him, those are the things that defile a man.
and he said to them, "You know how unlawful it is for a Jewish man to associate with or to approach a Gentile; and yet God has shown to me that I should call no man common or unclean;
All things indeed are pure to the pure; but to those who are defiled and unbelieving nothing is pure; but even their mind and conscience have been defiled.
Do not be carried away with various and strange doctrines. For it is good for the heart to be established by grace, not by foods, by which those having walked were not profited.