Sinless Perfection

Do the warnings in Hebrews tell us that we are to become sinless, that is a state of sinless perfection? That certainly is not the case as other scriptures will testify to. I heard a lady say that she hadn't sinned in 9 years. Besides the obvious sin of pride one has to wonder what she did 9 years ago. The warnings are against sinning as sin will lead to a downward spiral but sin will happen because we live in a fallen world. The warnings are against apostasy. How do we guard against apostasy? We must fix our eyes on Jesus.