God aims first to renew man's darkened spirit by imparting life to it, because it is this spirit which God originally designed to receive His life and to commune with Him. God's intent after that is to work out from the spirit to permeate man's soul and body.
Watchman NeeIf whatever men know comes through their brain without the Holy Spirit regenerating their spirit, then their knowledge will help them not one whit. If their belief rests in man's wisdom and not in God's power, they are merely excited in their soul.
Watchman NeeThe Spirit is both a builder and a dweller. He cannot dwell where he has not built; He builds to dwell and dwells in only what he has built.
Watchman Nee