Warfare spiritual- christiansquoting.org.uk
If you come forward to serve the Lord, prepare yourself for temptation.... Accept whatever is brought upon you, and in changes that humble you be patient.- Sirach 2:1,4
It is right noble to fight with wickedness and wrong; the mistake is in supposing that spiritual evil can be overcome by physical means. -Lydia Maria Child (1802-1880) _Letters From New York_, Volume 1 
In heaven we shall appear, not in armour, but in robes of glory. But here these are to be worn night and day; we must walk, work, and sleep in them, or else we are not true soldiers of Christ.- William Gurnall
Take heart therefore, O ye saints, and be strong; your cause is good, God himself espouseth your quarrel, who hath appointed you his own Son, General of the field, called 'the Captain of our salvation,' Heb 2:10. - WILLIAM GURNALL
When principles that run against your deepest convictions begin to win the day, then battle is your calling, and peace has become sin; you must, at the price of dearest peace, lay your convictions bare before friend and enemy, with all the fire of your faith.- Abraham Kuyper
One of the things that surprised me when I first read the New Testament seriously was that it talked so much about a Dark Power in the universe - a mighty evil spirit who was held to be the power behind death and disease and sin. The difference is that Christianity thinks this Dark Power was created by God, and was good when he was created, and went wrong..it is a war between independent powers. It thinks it is a civil war, a rebellion and we are living in part of the universe occupied by the rebel. Enemy occupied territory - that is what the world is. Christianity is the story of how the rightful King has landed, you might say in disguise, and is calling us all to take part in His great campaign of sabotage.- C. S. LEWIS, Mere Christianity
Servant of God, well done; well hast thou fought
The better fight.
John Milton. 1608-1674. Paradise Lost. Book vi. Line 29.
Alas! Elisha's servant cried,
When he the Syrian army spied,
But he was soon released from care,
In answer to the prophet's prayer.
Straitway he saw, with other eyes,
A greater army from the skies;
A fiery guard around the hill,
Thus are the saints preserved still.
When Satan and his host appear,
Like him of old, I faint and fear;
Like him, by faith, with joy I see,
A greater host engaged for me.
The saints espouse my cause by prayer,
The angels make my soul their care;
Mine is the promise sealed with blood,
And Jesus lives to make it good.
John Newton, More with us than with them , Olney Hymn 40
To relinquish any of the Psalms on the excuse that its sentiments are too violent for a Christian is a clear sign that a person has also given up the very battle that a Christian is summoned to fight. The Psalms are prayers for those who are engaged in an ongoing, spiritual conflict. No one else need bother even opening the book. - Patrick Henry Reardon, Christ in the Psalms 
[Christ] tells us plainly, and without any qualifications, that we are involved in a war in which there is no room for neutrals. Yet people attempt to evade His statement. Generally speaking, these are the very people who are the quickest in laying the blame upon God for all the sorrow and sin in the world. They argue that He could prevent it. They excuse their own do-nothing attitude by making of evil's apparent predominance a ground for doubt of His loving kindness. It never seems to occur to them to look for the cause in mankind.- Hugh Redwood, Live Coals
Am I a soldier of the cross,
A follower of the Lamb,
And shall I fear to own His cause,
Or blush to speak His Name?
Must I be carried to the skies
On flowery beds of ease,
While others fought to win the prize,
And sailed through bloody seas?
Are there no foes for me to face*?
Must I not stem the flood?
Is this vile world a friend to grace,
To help me on to God?
Sure I must fight, if I would reign;
Increase my courage, Lord.
I'll bear the toil, endure the pain,
Supported by Thy Word.
Thy saints in all this glorious war
Shall conquer, though they die;
They see the triumph from afar,
By faith they bring it nigh.
When that illustrious day shall rise,
And all Thy armies shine
In robes of victory through skies,
The glory shall be Thine.
Isaac Watts, Am I a Soldier of the Cross? 1721.
The whole charismatic idea of true spirituality and of the normal Christian life is painfully close to the idea of a life touched by magic: perfect marriages, obedient children, no sickness, no divorce, no poverty, no tragedies, no defeats, no death. 'No dice,' saith God." - Monte Wilson