The quickest way to weaken a church is by teaching rote outwardly-expressed obedience to an outsider God. In that scenario, the strength of the flesh is strained to its utmost and any failure creates immediate opportunity for doubt.
The power to obey can only be taught in the context of an insider God, the indwelling Christ. In that scenario, "the flesh counts for nothing" (John 6:63) and any failure creates immediate confession and gratitude for His forgiveness.
We have taught the Incarnation, Life, Death and Resurrection of Jesus to generations while almost totally neglecting the equally outrageous idea of His INDWELLING Life within us. Consider Paul's incredulity that we'd ever doubt all that He gives in both dying for and living in us: "Moreover, if he [died] for us while we were sinners, now that we are men justified by the shedding of his blood, what reason have we to fear the wrath of God? If, while we were his enemies, Christ reconciled us to God by dying for us, surely now that we are reconciled we may be perfectly certain of our salvation through his living in us. Nor, I am sure, is this a matter of bare salvation—we may hold our heads high in the light of God’s love because of the reconciliation which Christ has made." (Romans 5)
A New Reformation is what is needed. One where the Inhabitation is both taught and held up as the chief theology through which all other theologies are considered. Nothing less than complete adherence to the Inner Life as the life of the Church can lead to obedience, "right thinking" and fruitful service for the Kingdom of Heaven.