To fight the devil we first have to establish who or what the devil is. Despite the widely held view of Christian mythology, the devil is not a fallen angel with supernatural powers. If we think that he is then we have lost the battle before we start.
Here is a link to information on the true nature of the Bible devil (please click on the title).
The devil is the personification of the evil desires which come from within our hearts or minds. The enemy that we must fight is within us.
Jeremiah 17:9 The heart is deceitful above all things, and desperately wicked: who can know it?
Mark 7:21-23 For from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders, 22 Thefts, covetousness, wickedness, deceit, lasciviousness, an evil eye, blasphemy, pride, foolishness: 23 All these evil things come from within, and defile the man.
Matthew 5:28 But I say unto you, That whosoever looketh on a woman to lust after her hath committed adultery with her already in his heart.
1 John 3:15 Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him.
James 1:14-16 But every man is tempted, when he is drawn away of his own lust, and enticed. 15 Then when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death. 16 Do not err, my beloved brethren.
Romans 8:13 For if ye live after the flesh, ye shall die: but if ye through the Spirit do mortify the deeds of the body, ye shall live.
Colossians 3:5-17 Mortify therefore your members which are upon the earth; fornication, uncleanness, inordinate affection, evil concupiscence, and covetousness, which is idolatry: 6 For which things’ sake the wrath of God cometh on the children of disobedience: 7 In the which ye also walked some time, when ye lived in them. 8 But now ye also put off all these; anger, wrath, malice, blasphemy, filthy communication out of your mouth. 9 Lie not one to another, seeing that ye have put off the old man with his deeds; 10 And have put on the new man, which is renewed in knowledge after the image of him that created him: 11 Where there is neither Greek nor Jew, circumcision nor uncircumcision, Barbarian, Scythian, bond nor free: but Christ is all, and in all. 12 Put on therefore, as the elect of God, holy and beloved, bowels of mercies, kindness, humbleness of mind, meekness, longsuffering; 13 Forbearing one another, and forgiving one another, if any man have a quarrel against any: even as Christ forgave you, so also do ye. 14 And above all these things put on charity, which is the bond of perfectness. 15 And let the peace of God rule in your hearts, to the which also ye are called in one body; and be ye thankful. 16 Let the word of Christ dwell in you richly in all wisdom; teaching and admonishing one another in psalms and hymns and spiritual songs, singing with grace in your hearts to the Lord. 17 And whatsoever ye do in word or deed, do all in the name of the Lord Jesus, giving thanks to God and the Father by him.
1 Corinthians 9:27 But I keep under my body, and bring it into subjection: lest that by any means, when I have preached to others, I myself should be a castaway.
The way we fight it is to read the scriptures daily in order to change the way we think.
Romans 12:2 And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God.
From the Bible we learn what God wants us to do.
Matthew 7:21 Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.
1 John 2:17 And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever.
We are to pray frequently that we might avoid temptation.
Matthew 26:41 Watch and pray, that ye enter not into temptation: the spirit indeed is willing, but the flesh is weak.
God has provided a way of escape from sin and death by Jesus Christ. Jesus destroyed the devil within himself by dying.
Hebrews 2:14 Forasmuch then as the children are partakers of flesh and blood, he also himself likewise took part of the same; that through death he might destroy him that had the power of death, that is, the devil
That which has the power of death is the lust that leads us to sin.
James 1:15 when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death.
Romans 6:23 For the wages of sin is death
Jesus died without sin.
Christ, in overcoming sin in his flesh makes it possible for those who believe and obey the gospel to have their sins forgiven and Christ’s righteousness imputed to them. Sins are forgiven and righteousness is imputed by faith in Jesus Christ. However, faith is not simply a belief in Jesus Christ. God requires obedience to the gospel preached by Christ.
James 2:20 But wilt thou know, O vain man, that faith without works is dead?
Mark 16:15,16 And he said unto them, Go ye into all the world, and preach the gospel to every creature. 16 He that believeth and is baptized shall be saved; but he that believeth not shall be damned (condemned).
If we are not baptised by immersion we cannot be saved. Baptism washes away all our previous sins and we begin a new life in Christ.
Acts 2:38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins...
Acts 22:16 And now why tarriest thou? arise, and be baptized, and wash away thy sins, calling on the name of the Lord.
Romans 6:3,4 Know ye not, that so many of us as were baptized into Jesus Christ were baptized into his death? 4 Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life.
Ephesians 4:22-24 That ye put off concerning the former conversation the old man, which is corrupt according to the deceitful lusts; 23 And be renewed in the spirit of your mind; 24 And that ye put on the new man, which after God is created in righteousness and true holiness.
After baptism, despite our best intentions we will still sin; but these sins can be forgiven by repentance and confession in prayer.
1 John 2:7-10 But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin. 8 If we say that we have no sin, we deceive ourselves, and the truth is not in us. 9 If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness. 10 If we say that we have not sinned, we make him a liar, and his word is not in us.
1 John 2:1,2 My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous: 2 And he is the propitiation for our sins...
All sins that men commit (except blasphemy against the Holy Spirit) can be forgiven in Jesus Christ.
Matthew 12:31 Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Ghost shall not be forgiven unto men.
Acts 13:39 by him (Jesus Christ) all that believe are justified from all things, from which ye could not be justified by the law of Moses.
This is not a licence to sin; it excludes those sins continued in wilfully after baptism on the presumption that they will be forgiven.
Hebrews 10:26 For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,
The comfort of God fighting their battles for them was given to Israel on condition that they did not sin.
Exodus 14:13 And Moses said unto the people, Fear ye not, stand still, and see the salvation of the LORD,
Deuteronomy 20:3 And shall say unto them, Hear, O Israel, ye approach this day unto battle against your enemies: let not your hearts faint, fear not, and do not tremble, neither be ye terrified because of them; 4 For the LORD your God is he that goeth with you, to fight for you against your enemies, to save you.
Deuteronomy 31:6 Be strong and of a good courage, fear not, nor be afraid of them: for the LORD thy God, he it is that doth go with thee; he will not fail thee, nor forsake thee... 8 And the LORD, he it is that doth go before thee; he will be with thee, he will not fail thee, neither forsake thee: fear not, neither be dismayed.
Joshua 23:10 One man of you shall chase a thousand: for the LORD your God, he it is that fighteth for you, as he hath promised you.
1 Samuel 17:47 And all this assembly shall know that the LORD saveth not with sword and spear: for the battle is the LORD’S, and he will give you into our hands.
When Israel sinned against God, God left them; when they repented and did that which was right God fought for them.
2 Chronicles 15:2 The LORD is with you, while ye be with him; and if ye seek him, he will be found of you; but if ye forsake him, he will forsake you.
2 Chronicles 15:4 But when they in their trouble did turn unto the LORD God of Israel, and sought him, he was found of them.
2 Chronicles 15:15 And all Judah rejoiced at the oath: for they had sworn with all their heart, and sought him with their whole desire; and he was found of them: and the LORD gave them rest round about.
2 Chronicles 33:12 And when he was in affliction, he besought the LORD his God, and humbled himself greatly before the God of his fathers, 13 And prayed unto him: and he was intreated of him, and heard his supplication, and brought him again to Jerusalem into his kingdom. Then Manasseh knew that the LORD he was God.
Isaiah 55:6 Seek ye the LORD while he may be found, call ye upon him while he is near: 7 Let the wicked forsake his way, and the unrighteous man his thoughts: and let him return unto the LORD, and he will have mercy upon him; and to our God, for he will abundantly pardon.
James 4:8 Draw nigh to God, and he will draw nigh to you. Cleanse your hands, ye sinners; and purify your hearts, ye double minded.
We are not called upon to fight physically, our warfare is spiritual.
2Corinthians 10:3-5 For though we walk in the flesh, we do not war after the flesh: 4 (For the weapons of our warfare are not carnal, but mighty through God to the pulling down of strong holds;) 5 Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ;
If we seek the kingdom of God by refraining from sin and doing that which is right, God will be with us in all our troubles. Nothing will be able to separate us from the love of God.
Romans 8:28-39 And we know that all things work together for good to them that love God, to them who are the called according to his purpose... 31 What shall we then say to these things? If God be for us, who can be against us? 32 He that spared not his own Son, but delivered him up for us all, how shall he not with him also freely give us all things? 33 Who shall lay any thing to the charge of God’s elect? It is God that justifieth. 34 Who is he that condemneth? It is Christ that died, yea rather, that is risen again, who is even at the right hand of God, who also maketh intercession for us. 35 Who shall separate us from the love of Christ? shall tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword? 36 As it is written, For thy sake we are killed all the day long; we are accounted as sheep for the slaughter. 37 Nay, in all these things we are more than conquerors through him that loved us. 38 For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come, 39 Nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.
I hope you have found this helpful.
May God bless you,