The Christian life is referred to in scripture as a race that we run. It is called a course, that we walk. It is also stated as a war that we are in. Once you decide to deny yourself, take up the cross, and follow Jesus you are ensured a fight on your hands. The apostle Paul sought to encourage the believers in Ephesus to be clothed for battle. He pointed out that there were weapons to fight with(2 Cor.10:4). He declared there was armor to suite up in(Eph. 6). To put on the Lord Jesus Christ and make no provision for the flesh(Rom.13:14).
When you are in a battle that is a matter of life or death, there is a definite sense of sobriety. There is an understanding of the seriousness of what you are up against. The Bible tells us that we are not wrestling against flesh and blood. It is not so much a physical assailant that we can see, rather it is invisible hosts of wickedness that we are accosted by(Eph.6:12). The attacks that come against the believer come in various forms. For some, it is a great battle with depression. An overwhelming sense of despair that renders one helpless. For others it may be fear, still others it may be pride. The darker the days become, the more intense the battle becomes. The greater the usefulness of the believer, the bigger the target on their back. It is important to know that this is normal. That you are not going insane, your in your right mind. But this is called spiritual warfare. In war, it is imperative to a have a strategy. For the believer the strategy is to be clothed in the armor. To find shelter in Jesus. To recognize the attacks when they come. To use the Word of God, Prayer, and Worship, as your chief artillery. Also it is essential to keep in mind the battle is already won. The victory is ours in Christ already. Jesus is the victor and we walk in His victory. However we must still battle. One day we will exchange our weapons for a crown, until then we fight.
1 Peter 5:8 Be sober, be vigilant; because your adversary the devil walks about like a roaring lion, seeking whom he may devour.