Overcoming sin, blessed though it surely is, is but the bare minimum of a believers experience. There is nothing astonishing in it. Not to overcome sin is what ought to astonish us.
Watchman NeeGod 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 Nee