Because the carnal mind is enmity against God; for it is not subject to the law of God, nor indeed can be.
Train up a child in the way he should go,
And when he is old he will not depart from it.
But those things which proceed out of the mouth come from the heart, and they defile a man. For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies.
Then the LORD saw that the wickedness of man was great in the earth, and that every intent of the thoughts of his heart was only evil continually.
" The heart is deceitful above all things,
And desperately wicked;
Who can know it?
Because narrow is the gate and difficult is the way which leads to life, and there are few who find it.
For what I am doing, I do not understand. For what I will to do, that I do not practice; but what I hate, that I do. If, then, I do what I will not to do, I agree with the law that it is good. But now, it is no longer I who do it, but sin that dwells in me. For I know that in me (that is, in my flesh) nothing good dwells; for to will is present with me, but how to perform what is good I do not find. For the good that I will to do, I do not do; but the evil I will not to do, that I practice. Now if I do what I will not to do, it is no longer I who do it, but sin that dwells in me. I find then a law, that evil is present with me, the one who wills to do good. For I delight in the law of God according to the inward man. But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members. O wretched man that I am! Who will deliver me from this body of death? I thank God—through Jesus Christ our Lord! So then, with the mind I myself serve the law of God, but with the flesh the law of sin.
For the flesh lusts against the Spirit, and the Spirit against the flesh; and these are contrary to one another, so that you do not do the things that you wish.
in which you once walked according to the course of this world, according to the prince of the power of the air, the spirit who now works in the sons of disobedience,
that you put off, concerning your former conduct, the old man which grows corrupt according to the deceitful lusts, and be renewed in the spirit of your mind, and that you put on the new man which was created according to God, in true righteousness and holiness.
1 John 1:7-9
But if we walk in the light as He is in the light, we have fellowship with one another, and the blood of Jesus Christ His Son cleanses us from all sin. If we say that we have no sin, we deceive ourselves, and the truth is not in us. If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.
Keep your heart with all diligence,
For out of it spring the issues of life.
How long will you slumber, O sluggard?
When will you rise from your sleep?
A little sleep, a little slumber,
A little folding of the hands to sleep—
I went by the field of the lazy man,
And by the vineyard of the man devoid of understanding;
And there it was, all overgrown with thorns;
Its surface was covered with nettles;
Its stone wall was broken down.
When I saw it, I considered it well;
I looked on it and received instruction:
A little sleep, a little slumber,
A little folding of the hands to rest;
So shall your poverty come like a prowler,
And your need like an armed man.
Blessed are those who hunger and thirst for righteousness, For they shall be filled.
And no one puts new wine into old wineskins; or else the new wine will burst the wineskins and be spilled, and the wineskins will be ruined. But new wine must be put into new wineskins, and both are preserved. And no one, having drunk old wine, immediately desires new; for he says, "The old is better.""
What shall we say then? Shall we continue in sin that grace may abound? Certainly not! How shall we who died to sin live any longer in it?
Therefore we were buried with Him through baptism into death, that just as Christ was raised from the dead by the glory of the Father, even so we also should walk in newness of life. For if we have been united together in the likeness of His death, certainly we also shall be in the likeness of His resurrection, knowing this, that our old man was crucified with Him, that the body of sin might be done away with, that we should no longer be slaves of sin.
Do you not know that to whom you present yourselves slaves to obey, you are that one’s slaves whom you obey, whether of sin leading to death, or of obedience leading to righteousness? But God be thanked that though you were slaves of sin, yet you obeyed from the heart that form of doctrine to which you were delivered. And having been set free from sin, you became slaves of righteousness. I speak in human terms because of the weakness of your flesh. For just as you presented your members as slaves of uncleanness, and of lawlessness leading to more lawlessness, so now present your members as slaves of righteousness for holiness.
And do not be conformed to this world, but be transformed by the renewing of your mind, that you may prove what is that good and acceptable and perfect will of God.
2 Corinthians 4:16
Therefore we do not lose heart. Even though our outward man is perishing, yet the inward man is being renewed day by day.
that He might sanctify and cleanse her with the washing of water by the word,
being confident of this very thing, that He who has begun a good work in you will complete it until the day of Jesus Christ;
Let your conduct be without covetousness; be content with such things as you have. For He Himself has said, "I will never leave you nor forsake you."