The battle is lost or won in the secret places...

  The battle is lost or won in the secret places of the will before God, never first in the external world. The Spirit of God apprehends me and I am obliged to get alone with God and fight the battle out before Him. Until this is done, I lose every time. The battle may take one minute or a year, that will depend on me, not on God; but it must be wrestled out alone before God, and I must resolutely go through the hell of a renunciation before God. Nothing has any power over the man who has fought out the battle before God and won there.

If I say, "I will wait till I get into the circumstances and then put God to the test," I shall find I cannot. I must get the thing settled between my self and God in the secret places of my soul where no stranger intermeddles, and then I can go forth with the certainty that the battle is won. Lose it there, and calamity and disaster and upset are as sure as God's decree. The reason the battle is not won is because I try to win it in the external world first. Get alone with God, fight it out before Him, settle the matter there once and for all.
...Oswald Chambers