Titus 1:14-16

not paying attention to Jewish myths and the commandments and rules of men who turn their backs on the truth. To the pure, all things are pure; but to the corrupt and unbelieving, nothing is pure; both their mind and their conscience are corrupted. They profess to know God [to recognize and be acquainted with Him], but by their actions they deny and disown Him. They are detestable and disobedient and worthless for good work of any kind.