Resisting the devil is your responsibility based on the authority you possess in Christ.
The whole purpose of the Bible is to teach us how to have a relationship with God and live in harmony with one another. We do this by assuming our responsibilities for today and trusting God for tomorrow.
Getting rid of the old self was God's responsibility, but rendering the flesh and its deeds inoperative is our responsibility (Romans 8:12). God has changed your nature, but it's your responsibility to change your behavior by "putting to death the deeds of the body" (Romans 8:13).
Freedom in Christ from our sinful nature and the god of this world is the inheritance of every believer. Christ has set you free through His victory over sin and death on the cross. But if you have lost a measure of your freedom because you have failed to stand firm in the faith or you have disobeyed God, it is your responsibility to do whatever is necessary to maintain a right relationship with God. Your eternal destiny is not at stake; you are secure in Christ. But your daily victory in Him will be tenuous at best if you fail to assume your responsibility to maintain your freedom in Christ.
Remember: you are not the helpless victim of a tug-of-war between two nearly equal heavenly superpowers. Compared to Satan's limited attributes, God is immeasurable in His omnipotence, omnipresence and omniscience--and you are united with Him!
Persons who want to move forward in Christian maturity can certainly benefit from the discipling of others. And those who seek freedom from their past can be helped through the counseling of others. But ultimately every Christian is responsible for his or her own maturity and freedom in Christ. Nobody can make you grow. That's your decision and daily responsibility. We absolutely need God, and we also need the support of one another. Thankfully, none of us walks through the disciplines of personal maturity and freedom alone. The indwelling Christ is eagerly willing to walk with us each step of the way.
We must assume our responsibility for choosing the truth. We can't always tell whether the thought comes from the TV set, our memory bank, our imagination, or a deceiving spirit. Regardless of where a thought originates, examine it in the light of God's Word and choose the truth.
Lord, help me today as I assume my responsibility to take every thought captive to the obedience of Christ.
We can't assume responsibility for someone else, but we can serve as the Lord's instrument to affect their freedom. It is every individual's responsibility to resist the devil, put on the armor of God, confess, forgive, renounce sin, and take every thought captive to the obedience of Christ. But according to 2 Timothy 2:24-26, by the grace of God we can help them.
Paul instructs us to make no provision for the flesh. What if we do? We are told to take every thought captive to the obedience of Christ. What if we don't? James 4:7 admonishes us to "resist the devil and he will flee from you." What if we don't resist him? Is he required to flee from us if we don't take our stand against him? No, if we don't resist him, he doesn't have to go. We have the assurance of God's protection, but we must assume our responsibility to personally resist Satan.
Choosing truth, living a righteous life, and donning the armor of God is each believer's individual responsibility. I cannot be responsible for you, and you cannot be responsible for me. I can pray for you, encourage you in the faith, and support you, but if you go into the battle without your armor on, you may get hurt. As much as that may be a matter of concern for me, I still cannot make those decisions of responsibility for you. Those choices are yours alone.
Sin which is allowed to reign is like the dog that bits you on the leg and won't let go. Not realizing there is a dog, you beat on yourself for leaving the door open and cry out to God for forgiveness. He forgives you, but the dog is still there. Why not cry out to God and beat on the dog instead of yourself? James 4:7 tells us, "Submit therefore to God. Resist the devil and he will flee from you." We are correct in confessing our sin, but we have failed to follow the complete biblical formula which breaks the cycle: sin-confess-resist . We must first assume our responsibility for opening the door, then we must resist Satan and command him to leave if we are going to experience victory over sin.