Phil.4 Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things. Eph.5 Set your minds on things above, not on earthly things.
When you got saved you received a new spirit. That spirit is perfect and wants to please God. However your mind is not new, you have the same mind you had when you were a sinner. And so God says your mind has to be transformed by reading the Word of God Rom.12 Do not conform to the pattern of this world, but be transformed by the renewing of your mind. with the Word of God Satan knows that your mind is still the same so he try's to attack your mind. The battle ground here on earth is for the control of your mind. The only weapon satan has is to attack you thru your thoughts. He tries to discourage you by telling you about all of your failures, sins, wrong choices and bad relationships you have had. He wants to take control of you by controlling your mind. He has no power so he uses deception and lies to try to deceive you. God tells you how to fight Satan. God says you should bind all evil spirits out of your mind and put on God's Armor. Then pray a hedge of protection around yourself. God will do the rest. Once you are saved you are God's child and wants you to know who you are in Christ. God says you are His child and you are more than a conqueror. He says you are an ambassador for Christ and you are to fight the evil around you. He also says you can do all things thru Christ and that all things are possible if you believe. So trust God and use His might to strengthen yourself. Here are some scriptures that God says you should do to protect your mind.
First does God want you healed? 3 John 2 Beloved, I wish above all things that thou mayest prosper and be in health, even as thy soul prospereth. The answer is yes so He gave us scriptures to accomplish healing in our lives Is.53 But He was pierced for our transgressions, He was crushed for our iniquities; the punishment that brought us peace was upon Him, and by His stripes we are healed. Worship the LORD your God, and his blessing will be on your food and water. I will take away sickness from among you, Exodus 23:25 PSALM 107:20 HE SENT HIS WORD AND HEALED THEM, AND DELIVERED THEM FROM THEIR DESTRUCTIONS. Ps.103 Who forgives all your iniquities, Who heals all your diseases, Isaiah 40:31 - But those who hope in the Lord will renew their strength. They will soar on wings like eagles; they will run and not grow weary, they will walk and not be faint Psalm 41:3 The Lord sustains him on his sickbed; in his illness you restore him to full health.