Sanctify them through Thy truth: Thy word is truth. -John 17:17

The best proof I can give you of the holy tendency of our doctrines is this great fact, that in every age those who have held the doctrines of grace have exhibited in their lives a holy walk and conversation…And we have told you that the Holy Ghost gives a new heart, and a right spirit, and that there is something more required than you can do yourselves; that you are unable to perform such good things as God expects from you, therefore God the Spirit must renovate you.

“Except ye have the spirit of Christ, ye are none of His.” Except ye live like Christ, ye shall not be with Christ at last; if your spirit be not sanctified in this world, you will not find that God will sanctify you when you come before His throne. But you, poor sinners, who have no holiness of your own, and no good works at all; I know you have not any, because you are not a child of God. Do you feel that you have not? Come then, and Christ will give you some: He will give you Himself. If you believe on the Lord Jesus, He will wash you from all your sins, give you a new heart, and henceforth your life shall be holy, your conduct shall be consistent, He shall keep you to the end, and you shall most assuredly be saved. God bless this testimony to any such as are living in sin, that they may be reclaimed from it; for Christ’s sake! Amen.~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0070.cfm