Charles H. Spurgeon on Psalms 143:10

Teach me to do thy will. The Lord doth no sooner call his people to, himself, but as soon as ever he hath thus crowned them with these glorious privileges, and given them any sense and feeling of them, them they immediately cry out, O Lord, what shall I now do for thee? How shall I now live to thee? They know now that they are no more their own, but his; and therefore should now live to him. It is true indeed obedience to the law is not required of us now as it was of Adam; it was required of him as a condition antecedent to life, but of those that be in Christ it is required only as a duty consequent to life, or as a rule of life, that seeing he hath purchased our lives in redemption, and actually given us life in vocation and sanctification, we should now live unto him, in all thankful and fruitful obedience, according to his will revealed in the moral law. It is a vain thing to imagine that our obedience is to have no other rule but the Spirit, without an attendance to the law: the Spirit is indeed the efficient cause of our obedience, and hence we are said to be "led by the Spirit" (Ro 8:14); but it is not properly the rule of our obedience, but the will of God revealed in his word, especially in the law, is the rule; the Spirit is the wind that drives us in our obedience; the law is our compass, according to which it steers our course for us: the Spirit and the law, the wind and the compass, can stand well together. Teach me to do thy will; for thou art my God (there is David's rule, viz., God's will revealed); Thy Spirit is good (there is David's wind, that enabled him to steer his course according to it). The Spirit of life doth free us from the law of sin and death; but not from the holy, and pure, and good, and righteous law of God. Ro 8:1-3. —Thomas Shepherd, in "The Sound Believer," 1671.