Here are a couple paragraphs:
Yet today, the Old Covenant thinking is still prevalent in the body of Christ. Average Christians have been taught, and believe, that the sins they committed before they were born again were all forgiven the moment they were saved. But they believe the sins they commit after their salvation all have to come under the blood and be confessed, one by one.
The extreme legalist believes that if a Christian does not confess their sins they will go straight to hell. The less extreme believe that at the very least, the person will lose their fellowship with the Lord, and He will not answer their prayers. Both are wrong. If you have made Jesus your Lord, you’ve become a new creature, and sin is no longer an issue between you and God.
Hebrews 10:10 says,
“By the which will we are sanctified through the offering of the body of Jesus Christ once for all.”
Verse 14 goes on to say,
“For by one offering he hath perfected for ever them that are sanctified.”
I'm still working this out for myself, with His help, of course; it's a process.