Spurgeon writes:

“According to this gracious covenant (the new covenant of Hebrews) the Lord treats His people as if they had never sinned. Practically, He forgets all their trespasses. Sins of all kinds He treats as if they had never been; as if they were quite erased from His memory. O miracle of grace! God here does that which in certain aspects is impossible to Him. His mercy works miracles which far transcend all other miracles. Our God ignores our sin now that the sacrifice of Jesus has ratified the covenant. We may rejoice in Him without fear that He will be provoked to anger against us because of our iniquities. See ! He puts us among the children; He accepts us as righteous; He takes delight in us as if we were perfectly holy. He even puts us into places of trust; makes us guardians of His honor, trustees of the crown jewels, stewards of the Gospel. He counts us worthy, and gives us a ministry; this is the highest and most special proof that He does not remember our sins. Even when we forgive an enemy, we are very slow to trust him; we judge it to be imprudent to do so. But the Lord forgets our sins, and treats us as if we had never erred. O my soul, what a promise is this! Believe it and be happy.”

You may be thinking, “Yes, that’s all well and good but we do sin. How do we overcome this sinful tendency?” That’s a topic for another day. But the short answer is that as we live by faith in the truth of Scripture, and meditate on his Word, God’s Spirit will gradually make us more like Christ:

But we all, with unveiled face, beholding as in a mirror the glory of the Lord, are being transformed into the same image from glory to glory, just as by the Spirit of the Lord.

 2 Corinthians 3:18

Sanctification — growing in Christlikeness, including the desire for such growth are all part of what Christ purchased for us on the cross and provided in the New Covenant. He gives the new life and the desire to grow.

But this is the covenant that I will make with the house of Israel after those days, says the Lord: I will put My law in their minds, and write it on their hearts; and I will be their God, and they shall be My people. Jeremiah 31:33

I will put My Spirit within you and cause you to walk in My statutes, and you will keep My judgments and do them. Ezekiel 36:27

for it is God who works in you both to will and to do for His good pleasure. Philippians 2:13

But of Him you are in Christ Jesus, who became for us wisdom from God—and righteousness and sanctification and redemption—  1 Corinthians 1:30 (Christ is our righteousness and our sanctification.)

Are you so foolish? Having begun in the Spirit, are you now being made perfect by the flesh?  Galatians 3:3 (The question expects an answer of “No”.)