Believer's are in a warfare against the devil and his demons. The earlier we realize this and put on these weapons the better our chances of winning the heavenly race is sure and guaranteed. The bible admonishes the believer's to put on the whole armor of God in order to withstand the wiles of the devil. 
Finally, my brethren, be strong in the Lord and in the power of His might. Put on the whole armor of God, that you may be able to stand against the wiles of the devil. For we do not wrestle against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this age, against spiritual hosts of wickedness in the heavenly places. Therefore take up the whole armor of God, that you may be able to withstand in the evil day, and having done all, to stand.

Having girded your waist with truth, having put on the breastplate of righteousness, and having shod your feet with the preparation of the gospel of peace; above all, taking the shield of faith with which you will be able to quench all the fiery darts of the wicked one. And take the helmet of salvation, and the sword of the spirit, which is the word of God; praying always with all prayer and supplication in the Spirit, being watchful to this end with all perseverance and supplication for all the saints{ Ephesians 6:10-18}.

An understanding that whatever negative character anyone around us displayed is influenced by the devil, will help us in the fight against the devil. Notice verse 11 says, For we do not wrestle against flesh and blood; our fight is not against the human being we are seeing but rather the spirit behind their actions. When Peter try to rebuke Jesus about his death on the cross , Jesus immediately rebuke the devil in Peter and not Peter, He said get behind me devil, this tells us that our war is not flesh and blood. The illustrates the forces we are fighting as summarized below;

Immediately you accept Jesus as your Lord and Savior, the devil ultimate goal is to destroy your faith, win your allegiance back to himself and depriving you of spending your eternity with Christ.  By this he will employ vast array of strategies; including throwing to you the affair of this life that will shift your focus from Christ to worldly things, the pursuit of wealth, fame, careers etc. It could be tribulations, peril, suffering, sickness, adversities, lack and many. No matter how far you have grown, he has not lost hope concerning you. But we are admonished to put on our armor to fight him back. These armors are briefly explained below;

Having girded your waist with truth: The first weapon is like a belt that hold other weapons. Jesus says, for you shall know the truth and the truth shall set you free. The truth is found in Jesus,,,, Jesus is the way, the truth and Life. Your knowledge of Jesus Christ is what you will use to hold other weapons. To wear the truth is to confess the truth, by admitting we are sinners, saved by grace not work, to serve God with all our heart, mind and soul and to love others like ourselves.

Having put on the breastplate of righteousness: A breastplate is for protection of the vital organ of human body, that if something tampers it will leads to immediate death. To live a victorious and incorruptible life, we need to put on Christ righteousness. No human being is righteous, our righteousness is of purchased by Christ blood on the cross. So we maintain this righteousness by having faith on Christ and doing those things he ask us to do and forsaking what He regards as evil. Righteousness means a right relationship with both God and one’s fellow human beings (Matthew 5:6). Failing to put on Christ  righteousness leads to; selfishness, greed, pride, idolatry, jealousy, envy, unfaithfulness, lies, fornication, etc.

Having shod your feet with the preparation of the gospel of peace: The gospel of peace of peace means walking in Christ ministry. Representing Christ on earth, engaging in the ministry of reconciliation, telling people about Christ in everywhere we go as it is the means by which we can stand upright before him. If we fail to do this, we will end up pursuing worldly things, giving the devil room to dominate over our life. In fact one way to overcome sin is to preach the gospel. 

Taking the shield of faith with which you will be able to quench all the fiery darts of the wicked one: Taking the shield of faith means putting our hope and focusing on Jesus for everything that comes to us in life. For all of the difficulties we encounter because of our faithlessness, we tend to fail to see how God saves, delivers, protects, defends, and safeguards us faithfully in the past.

When God declares, “I am your shield” we must receive it as fact. By His love, He protects us yet He also disciplines us. The promise of protection is a seal of our redemption so we need never fear being lost from God, and it is a promise fulfilled in this present testing in 1 Corinthians 10:13 where God promises that He will never let anything come against us that is too great for us to withstand but He will always provide the way of escape. Faith means believing that God will do it because He said He will do it and is capable of doing it.

Take the helmet of salvation: Putting on the Helmet of salvation means recognizing the price paid for us on the cross by Jesus Christ. Reflecting always the great sacrifice that Christ made for us, thanking and worshiping him for this great sacrifice; recognizing that we are doomed without Christ death on the cross. We wear the helmet when we live and walk after the things of the spirit and not canal things. When we recognize that we are dead to sin with Christ and that we now live to please Jesus Christ.

Sword of the spirit, which is the word of God: The word of God gives light to our path, it gives direction, it's our strength, it's the truth, it reveal Jesus and God. The devil would want to bring up so many things to challenge the Bible, but bible should remain our standard for judging the right and wrong any day anytime. Beware lest anyone cheat you through philosophy and empty deceit, according to the tradition of men, according to the basic principles of the world, and not according to Christ. For in Him dwells all the fullness of the Godhead bodily; and you are complete in Him, who is the head of all principality and power (Colossians 2:8-10).

Conclusively, we should always pray for ourselves, other saints, the ministers, the church and the society at large. Prayer help us to prevail in life and is suppose to be constant with perseverance. Always remembering that prays is a continuous exercise, with a sense of humility.  Then He came to the disciples and found them asleep, and said to Peter, “What? Could you not watch with Me one hour? Watch and pray, lest you enter into temptation. The spirit indeed is willing, but the flesh is weak.” ( Mathew 26: 40-41).