mind

Do not walk in darkness

So this I say, and affirm together with the Lord, that you walk no longer just as the Gentiles also walk, in the futility of their mind,

being darkened in their understanding, excluded from the life of God because of the ignorance that is in them, because of the hardness of their heart;

Ephesians 4:17-18 (NASB)

The pure and the defiled

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.

They profess to know God, but by their deeds they deny Him, being detestable and disobedient and worthless for any good deed.

Titus 1:15-16 (NASB)