Titus 1:14-16

14 not paying attention to Jewish fables and commandments of men who turn away from the truth.  15 To the pure, all things are pure; but to those who are defiled and unbelieving, nothing is pure; but both their mind and their conscience are defiled.  16 They profess that they know God, but by their works they deny him, being abominable, disobedient, and unfit for any good work.