These words from the lips of anyone but Him would be blasphemy. We have not only sinned in the past but we daily continually fall short of the righteousness of God and we continually need justification through out our earthly life. This means that we must always be repentant and trusting in the imputed righteousness of Christ until Jesus comes. We are saved by grace at the beginning of our Christian life and we are saved by grace at the coming of the Lord. Those who think that they will be sinless and without any taint before Jesus comes will never be at peace with God.
Sanctification is never the basis of our hope.
If we are in Christ today, we are ready if He should come today. This does not mean that we are without sin or selfishness and that we have total sanctification and perfect holiness of life, but that we have repented of our sins and are trusting in His imputed righteousness while at the same time we are seeking victory over all of our besetting sins and pleading for more and more of the Holy Spirit in our hearts to give us victory over the lust of the world, the lust of the eye, and the pride of life. Justification and Sanctification go hand in hand until Jesus comes. We will always need both and always confess the sinfulness of our lives and our need of the mercy of Christ. No Christian ever commits willful sin even now.