16. The Old Testament sacrifices were not in themselves acceptable to God. Nor did they render man acceptable. But in the estimation of the world--before men--they were pleasing, even regarded highly worthy. Men thought thereby to render themselves well-pleasing in God's sight. But the spiritual sacrifice is, in man's estimation, the most repugnant and unacceptable of all things. It condemns, mortifies and opposes whatever, in man's judgment, is good and well-pleasing. For, as before stated, nature cannot do otherwise than to live according to the flesh, particularly to follow its own works and inventions. It cannot admit that all its efforts and designs are vain and worthy of mortification and of death. The spiritual sacrifice is acceptable to God, Paul teaches, however unacceptable it may be to the world. They who render this living, holy sacrifice are happy and assured of their acceptance with God; they know God requires the death of the lusts and inventions of the flesh, and he alone desires to live and work in us. 17. Consequently, Paul's use of the word "body" includes more than outward, sensual vices and crimes, as gluttony, fornication, murder; it includes everything not of the new spiritual birth but belonging to the old Adam nature, even its best and noblest faculties, outer and inner; the deep depravity of self-will, for instance, and arrogance, human wisdom and reason, reliance on our own good works, on our own spiritual life and on the gifts wherewith God has endowed our nature. To illustrate: Take the most spiritual and the wisest individuals on earth, and while it is true that a fraction of them are outwardly and physically chaste, their hearts, it will be found, are filled with haughtiness, presumption and self-will, while they delight in their own wisdom and peculiar conduct. No saint is wholly free from the deep depravity of the inner nature. Hence he must constantly offer himself up, mortifying his old deceitful self. Paul calls it sacrificing the body, because the individual, on becoming a Christian, lives more than half spiritually, and the evil propensities remaining to be mortified Paul attributes to the body as to the inferior, the less important, part of man; the part not as yet wholly under the Spirit's influence. "Which is your spiritual (reasonable) service."