Someday the church can relax her guard, call her watchmen down from  the wall and live in safety and peace; but not yet, not yet....

The healthiest man has enough lethal bacteria in him to kill him within twenty-four hours except for one thing-the amazing power of the human organism to resist bacterial attack. Every mortal body must fight its internal enemies day and night. Once it surrenders its hours are numbered. Quite literally it must fight or die....

The church lives in a hostile world. Within and around her are enemies that not only could destroy her, but are meant to and will unless she resists force with yet greater force. The Christian would collapse from sheer external pressure were there not within him a counterpressure sufficiently great to prevent it. The power of the Holy Spirit is, therefore, not optional but necessary. Without it the children of God simply cannot live the life of heaven on earth. The hindrances are too many and too effective. 

A. W.Tozer That Incredible Christian, 86-87.

"Thank You for the power of the Holy Spirit within me to wage this
constant warfare for me. In my flesh I am so weak for such
unrelenting battle. Give Your strength today. Amen."