Titus 1:13-16

13This saying is true. Therefore rebuke them sharply, so that they will be sound in the faith

14and will pay no attention to Jewish myths or to the merely human commands of those who reject the truth.

15To the pure, all things are pure, but to those who are corrupted and do not believe, nothing is pure. In fact, both their minds and consciences are corrupted.

16They claim to know God, but by their actions they deny him. They are detestable, disobedient and unfit for doing anything good.