Battlefield

Many battles are won in the prayer closet.  Often enough they are won not by a single prayer but by intersession and petition of almighty god. 

Keep praying. Pay attention when you offer prayers of thanksgiving. At the same time also pray for us. Pray that God will give us an opportunity to speak the word so that we may tell the mystery about Christ. It is because of this mystery that I am a prisoner. Pray that I may make this mystery as clear as possible. This is what I have to do. Be wise in the way you act toward those who are outside ⌊the Christian faith⌋. Make the most of your opportunities. Everything you say should be kind and well thought out so that you know how to answer everyone.
Colossians 4:2-6 GW
http://bible.com/70/col.4.2-6.GW

The text below is from a devotional by A.W.Tozer.

I have met christians who insist that it is wrong to pray for the same thing twice, the reason being that if w truly beleive when we pray we have the answer the first time;  any second prayer betrays the unbelief of the first!

There are three things wrong with this teaching.  One is it ignoresa large body of scipture; the second is that it rarely works in practice, even for the saintlest soul; and the third is that, if persisted in, it robs the praying man of two of his mightiest weapons in his warfarewith the flesh and the devil - intersession and petition.

For let it be said without qualification that the effective intersessor is never a one-prayer man, neither does the successful  petitioner win his mighty resources in his first attempt!

It must be noted that such a teaching will very often result in an unconscious spiritual pride.

One has but to note the smug smile of superiority on the face of the one-prayer christian to sence that there is a lot of pride behind the smile.  While other christians wrestle with god in an agony of intersession they sit back in humble pride waiting it out.  They do not pray because they have already prayed.  The devil has no fear of such christians.  He has already won over them, and his technique has been false logic. 

A.W. Tozer