Almost all talk of battles and wars when concerning a Christian life refers to the inner battle that arises when a sinful thought tempts you. God’s Spirit and the flesh are at odds. When you have decided to only do God’s will and are being led by the Spirit, a conflict between the flesh and the Spirit arises: there is a battle wherein you must overcome the temptation and get victory over that sin. (Galatians 5:16-17; Hebrews 12:4)