Therefore, if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new. 2 Corinthians 5:17

Every man who tastes of the saving grace of God is made a new creature in Christ Jesus. Now if the doctrine of grace in the hands of an ordinary man might be dangerous, yet it would cease to be so in the hands of one who is quickened by the Spirit and created anew in the image of God. The Holy Spirit comes upon the chosen one, and transforms him: his ignorance is removed, his affections are changed, his understanding is enlightened, his will is subdued, his desires are refined, his life is changed-in fact, he is as one new-born, to whom all things have become new. This change is compared in Scripture to the resurrection from the dead, to a creation, and to a new birth. This takes place in every man who becomes a partaker of the free grace of God. “Ye must be born again,” said Christ to Nicodemus; and gracious men are born again. One said the other day, “If I believed that I was eternally saved, I should live in sin.” Perhaps you would; but if you were renewed in heart, you would not. “But,” says one, “if I believed God loved me from before the foundation of the world, and that therefore I should be saved, I would take a full swing of sin.” Perhaps you and the devil would; but God’s regenerate children are not of so base a nature. To them the abounding grace of the Father is a bond to righteousness which they never think of breaking: they feel the sweet constraints of sacred gratitude, and desire to perfect holiness in the fear of the Lord. All beings live according to their nature, and the regenerated man works out the holy instincts of his renewed mind: crying after holiness, warring against sin, labouring to be pure in all things, the regenerate man puts forth all his strength towards that which is pure and perfect. A new heart makes all the difference. Given a new nature, and then all the propensities run in a different way, and the blessings of Almighty love no longer involve peril, but suggest the loftiest aspirations. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1735.cfm