And you, that were sometime alienated and enemies in your mind by wicked works, yet now hath he reconciled… – Colossians 1:21

Believer, you will find that the world does not suit you as it once did. You will be out of your element, pining for another world; for there must needs be a new world to suit a new creature. Do you feel pantings after the new world? God will not give you what He has not taught you to long for, but your cravings and longings are the shadows of the coming mercy. Ask yourselves whether you know these mysteries. If you do not, may the Lord teach you; and if you do, praise and bless His name!..May I press upon every one to search himself, whether he knoweth what this being made a new creature means!

Our subject excites hope in the Christian. If God has made a new creature of him, which is the greatest work of grace, will He not do the lesser work of grace-namely, make the new creature grow up unto perfection? If the Lord has turned you to Himself, never be afraid that He will leave you to perish. If He had meant to destroy you, He would not have done this for you. God does not make creatures for annihilation. Chemists tell us that though many things are resolved into their primary gases by fire, yet there is not a particle less matter on the earth today than there was when it was created. No spiritual life that comes from God is ever annihilated. If you have obtained it, it never shall be taken from you-it shall be in you a well of water springing up unto everlasting life. If when you were an enemy, God looked upon you in grace, and changed you, and made you what you now are, will He not now that you are reconciled continue to preserve and nurture you till He presents you faultless before His presence with exceeding great joy? The Lord grant it to you!~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0881.cfm