I am the Lord, I do not change. (Malachi 3:6)
The authority of darkness is a very real thing to us. We have experiences, and if we were to capitulate to them, that would be the end of us. He tries to bring upon us that impingement of the authority of darkness, and if we surrender to it, capitulate to it, accept it, we are beaten. If we are the Lord's, Christ is within, and Christ is supreme and we must go on even if we have no feeling, or if we have a very bad feeling; when it seems to be the last thing we ought to be saying, we say it because it is God's fact, and when we begin to affirm God's fact we win through.
Believers know what it is for the enemy to try to make them accept the authority of darkness. Stand upon the truth of God. God does not change with our feelings. God does not alter with our consciousness. This whole life of ours is subject to variation more swift than the variation of weather, but He rules, unalterable, unchangeable. He is "the same yesterday, and today, and for ever." And if He is there within, He has come to stay, and victory is in faith; believing that, standing on that, holding to that; and we must carry that through to its final and full issue, that He is Lord of all, "Head of all principality and power." Satan will sometimes try to make us believe that he is in the place of ascendancy, the place of supremacy, but since Calvary he is not, we stand there.
By T. Austin-Sparks from: The Centrality and Supremacy of the Lord Jesus Christ - Chapter 4