“Thy faith hath saved thee.” – Luke 7:48

“Thy faith hath saved thee.” This is something that is already accomplished. You are saved; not, you shall be saved; but you are even now in possession of the priceless boon of salvation: “Thy faith hath saved thee.” All through the Scriptures, and especially in the New Testament, it is plainly asserted that believers in Christ are already in possession of salvation… All that was necessary to save them from the result of sin has been endured by the Lord Jesus Christ. He has ransomed them by His death upon the cross. He has stood in their stead, and borne their sin in His own body on the tree, and suffered the full penalty for it. He has finished the transgression, and made an end of sin, and made reconciliation for iniquity, and brought in for them everlasting righteousness; so that they are saved. The great work of their salvation was completed by Christ upon the cross when He laid down His life for them, and now they are “bought with a price,” even “the precious blood of Christ, as of a lamb without blemish and without spot.”

Our Lord Jesus Christ, who cannot lie, hath declared “that whosoever believeth in Him should not perish, but have everlasting life.” … we accept God’s promise of salvation as being just as sure as the salvation itself. Paul tells us that God’s promise has been confirmed by an oath, “that by two immutable things, in which it was impossible for God to lie, we might have a strong consolation, who have fled for refuge to lay hold upon the hope set before us.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2770.cfm