"The trouble with all false evangelism is that it does not start with doctrine, it does not start by realizing man's condition...If you and I realized that every man who is yet a sinner is absolutely dominated by the prince of the power of the air, the spirit that now worketh in the children of disobedience, if we only understood that he is really a child of wrath and dead in trespasses and sins, we would realize that only one power can deal with such an individual, and that is the power of God, the power of the Holy Ghost. And so we would put our confidence, not in man-made organisms, but in the power of God, in the prayer that holds on to God and asks for revival and a descent of the Spirit. We would realize that nothing else can do it. We can change men superficially, we can win men to our side and to our party, we can persuade them to join a church, but we can never raise the spiritually dead; God alone can do that." 
--D. Martyn Lloyd-Jones