…how much more shall the blood of Christ, who through the eternal Spirit offered Himself without blemish to God, purify your conscience from dead works to serve the living God. – Hebrews 9:14

One of the first signs of practical obedience is found in the obedience of the mind, the understanding, and the heart; and this is expressed in believing the teaching of Christ, trusting to His work, and resting in His salvation. Faith is the morning star of obedience. If we would work the work of God, we must believe on Jesus Christ whom He hath sent. Brethren, we do not give a secondary place to obedience, as some suppose. We look upon the obedience of the heart to the will of God as salvation. The attainment of perfect obedience would mean perfect salvation. We regard sanctification, or obedience, as the great design for which the Saviour died. He shed His blood that He might cleanse us from dead works and purify unto Himself a people zealous for good works. It is for this that we were chosen: we are elect unto holiness. We know nothing of election to continue in sin. It is for this that we have been called: we are “called to be saints.” Obedience is the grand object of the work of grace in the hearts of those who are chosen and called: they are to become obedient children, conformed to the image of the Elder Brother, with whom the Father is well pleased.

Try, by God’s grace, to believe more in the pardon of sin, more in the renovation by the Holy Spirit, more in the everlasting covenant, more in the love that had no beginning, and will never, never cease. Your hope does not lie in rushing into the darkness of doubt; but in returning repentantly into the still clearer light of a steadier faith. May you be helped to do so, and may we, all of us, and the whole multitude of the Lord’s redeemed, by faith go on to obey our Lord in all things! ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2195.cfm