The entrance of a demon to a man, in any part of him, does not make him a demon, any more than the entrance of the Holy Spirit makes a man God. It is when the believer knows the truth, and will not take an attitude of refusal to the ground giving place to the enemy, and thereby clings to known sin and gives known ground to evil spirits, that his innermost life becomes seriously affected, just as known sin which the man will not part with, brings a cloud between him and God. There are degrees in the manifestation of Christ's authority through the believer, over the spirits of evil, according to the degree of his personal victory described in our last chapter. Knowledge and discernment enables the believer to see where the Spirit of God would have him lay hold of the authority of Christ, and when to do so. For instance, authority over evil spirits to cast them out, is of no use in meeting their lies.
Truth is the weapon of authority then.
The truth of God, spoken with the authority of knowledge that it is the truth , will set the soul free. Let him note how much is said in the Scriptures about knowledge and understanding. The believer must be willing for the price of the knowledge necessary for discernment, for he cannot take an attitude of resistance to a thing he believes is of God, or is good, or towards which he is neutral. The believer must know their wiles, schemes, methods and accusations, weights on the spirit and their causes, and when hindrances and obstacles are brought about by the enemy, so as to be able to discern all these things, and resist them. Some of the expressions used in Scripture describing the attitude of the Church, and of individual members of Christ toward the powers of darkness, clearly show God's will and purpose for His people.