It is useless to undertake the impossible in any case; and in the matter of salvation from the penalty of sin, the only work which it is possible for God to accept as the ground of redemption is that which is already undertaken and fully completed by Christ on the Cross. By this finished work the believer is provided with a perfect standing before God, and is raised to the exalted position of an ambassador for Christ. That privilege of service does not affect the grounds of his salvation, but opens to him the glorious possibility of rewards (I Cor. 3:9-15). In the matter of salvation from the power of sin, the human will may be employed as an instrument through which the power of God may be manifested. The following passages reveal how directly He proposes to be the real power in the believer's life: "For it is God which worketh in you both to will and to do of his good pleasure" (Phil. 2:13). "For though we walk in the flesh, we do not war after the flesh: for the weapons of our warfare are not carnal, but mighty through God to the pulling down of strongholds; casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ" (II Cor. 10:3-5). "I can do all things through Christ which strengthened me" (Phil 4:13). "For apart from me ye can do nothing" (Jno. 15:5). It is assumed that the believer has recognized the perfectness of the will of God and has thrown his whole being open to His power and guidance. As a little child may avail himself of the wisdom and experience of his parents through obedience, so the believer has become willing to do whatever the infinite wisdom and love of God may choose for him. When thus committed to the will of God, and in true faith depending on Him, the mighty power of the Spirit will work in him and through him to the glory of God. "This I say then, Walk in the Spirit, and ye shall not fulfill the lust of the flesh" (Gal. 5:16). "For the law of the Spirit of life in Christ Jesus has made me free from the law of sin and death" (Rom. 8:2). Salvation in any form is, therefore, "not of works, lest any man should boast."