He who trusts his own heart is a fool (Proverbs 28:26a).

All the ways of a man are upright in his own sight (Proverbs 16:2a).

Furthermore, the hearts of the sons of men are full of evil, and insanity is in their hearts throughout
their lives.  Afterwards they go to the dead (Ecclesiastes 9:3b).

That which proceeds out of the man, that is what defiles the man. For from within, out of the heart
of men, proceed the evil thoughts, fornications, thefts, murders, adulteries, deeds of coveting and wickedness, as well as deceit, sensuality, envy, slander, pride and foolishness. All these evil things
proceed from within and defile the man (Mark 7:20-23).

I find then the principle that evil is present in me, the one who wishes to do good.  For I joyfully
concur with the law of God in the inner man, but I see a different law in the members of my body,
waging war against the law of my mind, and making me a prisoner of the law of sin which is in my
members.  Wretched man that I am!  Who will set me free from the body of this death? Thanks be to God through Jesus Christ our Lord! So then, on the one hand I myself with my mind am serving the law of God, but on the other, with my flesh the law of sin (Romans 7:21-25).

The Lord has looked down from heaven upon the sons of men, to see if there are any who
understand, who seek after God.  They have all turned aside; together they have become corrupt;
there is no one who does good, not even one (Psalm 14:2-3).

“For My thoughts are not your thoughts, neither are your ways My ways," declares the Lord.  "For as the heavens are higher than the earth, so are my ways higher than your ways, and My thoughts than your thoughts” (Isaiah 55:8-9).

This I say therefore,  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; and they,
having become callous, have given themselves over to sensuality, for the practice of every kind of
impurity with greediness.  But you did not learn Christ in this way, if indeed you have been taught in
Him, just as truth is in Jesus, that, in reference to your former manner of life, you lay aside the old
self, which is being corrupted in accordance with the lusts of deceit, and that you be renewed in the
spirit of your mind, and put on the new self, which in the likeness of God has been created in
righteousness and holiness of the truth (Ephesians 4:17-24).

I urge you therefore, brethren, by the mercies of God, to present your bodies a living and holy
sacrifice, acceptable to God, which is your spiritual service of worship.  And do not be conformed to this world, but be transformed by the renewing of your mind, that you may prove what the will of
God is, that which is good and acceptable and perfect (Romans 12:1-2).