Titus 1:15

Unto the pure all things are pure— "I know these Judaizing teachers value themselves highly upon the distinctions of food, which they inculcate as of so great importance to purity: but they are much mistaken. Unto Christians who are pure and upright; all sorts of meat are clean and pure; but unto those who are polluted with vice, and who, though they understand the liberty of Christians, are unfaithful,— απιστοις,— and would impose upon Christians the rituals of the Jewish law;—unto such, I say, nothing is clean and pure; but even their understanding and conscience are defiled, which ought to be their guide and director."