Brethren, God is faithful. He is not a man that He should lie; what He says, He does, and what He promises, He brings to pass (Num. 23:19). Do you truly trust this?

Herein lies our confidence. Not only that He will bring prophecy to fulfillment, but that He will fulfill His promises to us. Most important of those promises is, of course, our salvation. And part and parcel of that salvation is our sanctification.

Paul affirms this for us when He exhorts his confidence that “He who began a good work in you will perfect it until the day of Christ Jesus” (Phil. 1:6). Just as with salvation, we do not bring about our own sanctification - God does. It is He who is working in us “to will and to work for His good pleasure” (Phil. 2:13).

Read that again. It is God who works in us both to will and to do. This does not mean that He makes puppets out of us; but He transforms us. This is why Paul was able to say that it was no longer he who lived, but Christ lived in Him (Gal. 2:20), as we should also.

If you do not see this yet playing out in your life, do not despair. Pray. Surrender yourself. Put the flesh to death (Rom. 8:13), or as Christ said, daily deny yourself (Lk. 9:23). Because “faithful is He who calls you, and He also will bring [your sanctification] to pass” (1 Thes. 5:24).

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Spurgeon’s Morning and Evening Devotions

Morning, December 11

"Faithful is He that calleth you, who also will do it." 1 Thessalonians 5:24

Heaven is a place where we shall never sin; where we shall cease our constant watch against an indefatigable enemy, because there will be no tempter to ensnare our feet. There the wicked cease from troubling, and the weary are at rest. Heaven is the "undefiled inheritance"; it is the land of perfect holiness, and therefore of complete security. But do not the saints even on earth sometimes taste the joys of blissful security? The doctrine of God's word is, that all who are in union with the Lamb are safe; that all the righteous shall hold on their way; that those who have committed their souls to the keeping of Christ shall find Him a faithful and immutable preserver. Sustained by such a doctrine we can enjoy security even on earth; not that high and glorious security which renders us free from every slip, but that holy security which arises from the sure promise of Jesus that none who believe in Him shall ever perish, but shall be with Him where He is. Believer, let us often reflect with joy on the doctrine of the perseverance of the saints, and honour the faithfulness of our God by a holy confidence in Him.

May our God bring home to you a sense of your safety in Christ Jesus! May He assure you that your name is graven on His hand; and whisper in your ear the promise, "Fear not, I am with thee." Look upon Him, the great Surety of the covenant, as faithful and true, and, therefore, bound and engaged to present you, the weakest of the family, with all the chosen race, before the throne of God; and in such a sweet contemplation you will drink the juice of the spiced wine of the Lord's pomegranate, and taste the dainty fruits of Paradise. You will have an antepast of the enjoyments which ravish the souls of the perfect saints above, if you can believe with unstaggering faith that "faithful is He that calleth you, who also will do it."