Hebrews 10:14 For by one sacrifice he has made perfect forever those who are being made holy.
希伯来书 10：14 因为祂一次献祭，便叫那得以成圣的人永远完全。
We can never try by our own effort to perfect ourselves, because it is never possible. Even if you can do a thousand of good works, even if you can plan a lot of charities, but if we do not have Jesus, we do not have life. It is only with the son of God we have life, without the son of God we do not have life. So, no good works are able to perfect us and sanctify us, but only the blood of Jesus. Thus, through His once sacrifice it is powerful enough to make you holy! So, we are to be thankful that it is by the grace of God that we have Jesus, and as sure enough as His finished work, therefore you can be as sure on your salvation!! You've been made perfect my friend, so stop seeing yourself as full of sin, but through the blood of Jesus, you're holy and righteous! Amen!