Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to obey everything that I have commanded you. The new converts were to be discipled and taught that God wanted them to be doing the things that Christ's disciples had been doing. And Jesus would be with His people to the end of the age, doing His works through them as they were yielded to Him in faith. The reason ministries like ours exist at all is because of the failure of the Church to obey all of Christ's commission to His people. But we, and ministries like us, are reminders that God continues to work the way He did with the first century Church.
Spiritual warfare is a pro-active approach to our faith.
We actively resist the devil when his hosts harass us. We actively pursue spiritual disciplines that will make us stronger and better prepared. We actively engage the enemy when people are in spiritual bondage. We utilize prayer as a weapon to penetrate strongholds that cannot be reached in any other way. Spiritual warfare is the putting aside of passive attitudes towards faith which keep us from commitment and cause us to pursue only those things that will benefit us.