A lot of problems start in your mind.
Ephesians 4:17 (ESV) "Now this I say and testify in the Lord, that you must no longer walk as the Gentiles do, in the futility of their minds."
The church at Ephesus was made up of Gentiles and Jewish believers. Paul is not talking about the Gentiles who are saved. He is talking about lost people.
Galatians 3:7-9 (ESV) "Know then that it is those of faith who are the sons of Abraham. And the Scripture, foreseeing that God would justify the Gentiles by faith, preached the gospel beforehand to Abraham, saying, 'In you shall all the nations be blessed.' So then, those who are of faith are blessed along with Abraham, the man of faith."
Galatians 3:26-29 (ESV) "for in Christ Jesus you are all sons of God, through faith. For as many of you as were baptized into Christ have put on Christ. There is neither Jew nor Greek, there is neither slave nor free, there is no male and female, for you are all one in Christ Jesus. And if you are Christ's then you are Abraham's offspring, heirs according to promise."
1 Corinthians 6:11(ESV) "And such were some of you. But you were washed, you were sanctified, you were justified in the name of the Lord Jesus Christ and by the Spirit of our God."
As Christians you should look different from those in the world. Your mind should be different.
I. How do Gentiles think?
Ephesians 4:18-19 (ESV) "They are darkened in their understanding, alienated from the life of God because of ignorance that is in them, due to their hardness of heart. They have become callous and have given themselves up to sensuality, greedy to practice every kind of impurity."
A. They can't see the truth because they don't want to see the truth.
We ignore the truth because we want the opposite. The truth of God's word cuts to the heart. It is called conviction. Sometimes you would rather defend a lie so you don't want to admit that you are wrong.
Psalm 14:1 (ESV) "The fool says in his heart, 'There is no God.' They are corrupt, they do abominable deeds; there is none who does good."
B. They love their sin.
They give into every evil impulse and it starts in the mind.
Isaiah 5:20 (ESV) "Woe to those who call evil good and good evil, who put darkness for light and light for darkness who put bitter for sweet and sweet for bitter!"
We need to confess in our minds to God. When you are talking to yourself, talk to God about removing bad things from our minds. Sin can be like a box of Little Debbie's. We don't know how to stop sinning.
II. You can win the battle of the mind.
"I am just this way." NO YOU ARE NOT!
1 Corinthians 10:13 (ESV) "No temptation has overtaken you that is not common to man. God is faithful, and he will not let you be tempted beyond your ability, but with the temptation he will also provide the way of escape, that you may be able to endure it."
You can win the battle with God's help
2 Timothy 1:7 (ESV) "for God gave us a spirit not of fear but of power and love and self-control."
III. Lost Sensitivity
We can be hard hearted, but it is a dangerous place to be. Pharaoh hardened his heart and then God hardened his heart. The Israelites hardened their hearts in the wilderness. You can become so desensitized to sin that your heart will become hard. Sin does not bother us like it should.
Hebrews 3:8 (ESV) "Do not harden your hearts as in the rebellion on the day of testing in the wilderness,"
Proverbs 28: 13-14 (ESV) "Whoever conceals his transgressions will not prosper, but he who confesses and forsakes them will obtain mercy. Blessed is the one who fears the LORD always, but whoever hardens his heart will fall into calamity."
We have become desensitized to things that we should be sensitive to. Like David, some of us need to be broken and disciplined.
Psalm 57:10 (ESV) "For you steadfast love is great to the heavens, your faithfulness to the clouds."
Psalm 51:17 (ESV) "The sacrifices of God are a broken spirit; a broken and contrite heart, O God, you will not despise."
We should ask to be disciplined. It might be painful, but we need it.
Ephesians 4:20-24 (ESV) "But that is not the way you learned Christ!- assuming that you have heard about him and were taught in him, as the truth is in Jesus, to put off your old self, which belongs to your former manner of life and is corrupt through deceitful desires, and to be renewed in the spirit of your minds, and to put on the new self, created after the likeness of God in true righteousness and holiness."
IV. So what must I do?
A. Love the truth.
Jesus lived it, Jesus taught it, and sent the Holy Spirit to lead us. In him we have truth revealed in Scripture. Truth about God, about God.
B. Put off the old self.
Matthew 5:29-30 (ESV) "If your right eye causes you to sin, tear it out and throw it away. For it is better that you lose one of your members than that your whole body be thrown into hell. And if your right hand causes you to sin, cut it off and throw it away, For it is better that you lose one of your members than that your whole body go into hell."
This points to the seriousness of our sin. Take steps to put off your old self.
Hebrews 12:1 (ESV) "Therefore, since we are surrounded by so great a cloud of witness, let us also lay aside every weight, and sin which clings so closely, and let us run with endurance the race that is set before us,"
It is hard to run after God when you are dragging your sin behind you!
C. Be renewed in the spirit of your mind.
Be completely restored in darkest corners of your mind. Memorize scripture, pray and ask God for help.
Romans 12:1-2 (ESV) "I appeal to you therefore, brothers, by the mercies of God, to present your bodies as a living sacrifice, holy and acceptable to God, which is your spiritual worship. Do not be conformed to this world, but be transformed by the renewal of your mind, that by testing you may discern what is the will of God, what is good and acceptable and perfect."
Cut ties with your old self.
D. Put on the new self
2 Corinthians 5:17 (ESV) "Therefore, if anyone is in Christ, he is a new creation, The old has passed away; behold, the new has come."
Galatians 2:20 (ESV) "I have been crucified with Christ. It is no longer I who live, but Christ who lives in me. And the life I now live in the flesh I live by faith in the Son of God, who loved me and gave himself for me."
Colossians 3:1-2 (ESV) "If then you have been raised with Christ, seek the things that are above, where Christ is seated at the right hand of God. Set your minds on things that are above, not on things that are on earth."
You have to fill your mind with things from above. We don't need to be comfortable...we need to grow and to change.