The Christian Warrior: Wrestling with Sin, Satan, the World and the Flesh by Isaac Ambrose and published by Classics.
Soldiers of Christ, be aware that you are highly advanced in God's creation, that you occupy an important station, that you have an arduous work allotted to you, and that you have neither time nor talent to throw away. For you are enlisted under the banner of Christ; you have entered the armies of the Most High, and have taken the oath of allegiance to the King of Zion, and bound yourselves by an oath to fight the good fight of faith against sin, Satan, the world, and the flesh.
What formidable enemies are these! You have to encounter all the powers of hell, and their name is Legion. Fight them you now must, for you have put on the armour, and taken the field to fight all the enemies of God and man. When you survey the enemies' camp, and see their strength, their number, their stratagems, and inveterate malice, and are then made to feel your own weakness and nothingness, you tremble, and say, "How shall I go against these mighty hosts? Yet I must conquer them all, or die an eternal death."
O soldiers of Christ! Banish all your guilty fears. There is, after all, far more for you than against you. You are on the Lord's side, who fights for you. He is your refuge and strength, your sun and shield. He is with you in the field, to teach your hands to war, and to cover your head in the day of battle, and has promised you the victory.
(From the Preface)
