Through the years there have been wars between nations. In fact, the first child to be born, namely Cain, in anger killed his brother Abel. Because people want earthly things they fight to get possessions.
Now, fighting is not always sin. In fact God tells us in Ephesians 6:11 to "Put on the whole armor of God, that ye may be able to stand against the wiles of the devil." This means that we must fight against Satan, because he is fighting us through men. God told us in the day that Adam sinned that we would have to fight, because there would be enmity between the serpent and his seed and the woman and her seed. He also in that declaration assures us that we will have the victory.
We can in that light understand that we need armor in a very dangerous battle. And we can be thankful to God that He gives us protection. He changes His elect children and makes them hate the devil and all the sin he brings into this world. The devil hates those whom God has changed spiritually so that they love God and hate sin. Let us not forget that this spiritual battle is far more important than physical warfare of men who hate men for worldly reasons and carnal craving.
Now our fighting must be spiritual, not physical. we must be fighting against the lie, against false doctrines, against sin of every kind, and against all the attempts of the devil and his soldiers (men and fallen angels) which tempt us to walk in sin, and thus in hatred against God, Whose law we must keep fully and constantly.
Seek your protection then from all false doctrines which today are increasing in number and subtlety. Never give in to a false doctrine. Fight against all attempts to get us to turn away from God. And remember what happened to Adam and Eve when they agreed with Satan. Seek all the protection you can against Satan and his lies and love of sin.
Read: Ephesians 6:10-19 .
“Be humble. Be lowly. The best man in the church is the man who is willing to be a doormat for all to wipe their boots on, the brother who does not mind what happens to him at all, so long as God is glorified.” -C. Spurgeon