'Unholy' in the Bible

For those who are living according to the flesh set their minds on the things of the flesh [which gratify the body], but those who are living according to the Spirit, [set their minds on] the things of the Spirit [His will and purpose].

I know and am convinced [as one] in the Lord Jesus that nothing is unclean [ritually defiled, and unholy] in itself; but [nonetheless] it is unclean to anyone who thinks it is unclean.