"In whom, we have our redemption-- the remission of sins..." (Colossians 1:14 EBR)
Aren't you glad that in Christ, all our sins are remitted; past, present, and future? Imagine, what if someone says our future sins weren't taken care of by the blood of Jesus, when then is He going to fix them? When will they be remitted?
What if a Christian committed a sin at work and said to himself, "This office isn't a good place for me to pray right now. I'm going to hurry up with work so I can get home to pray, and get right with God." Imagine that while he's still at work, the trumpet for the Rapture of the Church suddenly sounds-- will he go to heaven or will he be left behind?
Now maybe you're thinking, "That Christian is done for! He can't go to heaven!" That means you really don't know the Lord. He's too passionate about your salvation to leave you behind because you made a mistake. He provided for the Christian what is called automatic cleansing! This is what the Word teaches.
Those who'll be left behind are the ones who haven't been walking in His light-- those who didn't really know Him and didn't love Him. The simple fact that you acknowledged that you did something wrong, for which you thought to talk to Him, shows that His light is in your heart.
(1 John 1:7)
"But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin."
The underline portion doesn't say you'll be cleansed after praying for forgiveness; no! Neither does it say that the blood of Jesus is going to cleanse you from sin. It's not futuristic, it's a continuous automatic process! His blood CLEANSES you each time the need arises.
Guess what? This auto-remission of your sins is a legal matter before God. It's no longer a matter of choice from God, it's a legal justification for a Christian. Hallelujah!
This is why it's so important that we know, understand, and walk daily in the light of God's Word, NOT in human assumptions. Walk in the light of your righteousness, pleasing the Lord with your life, and you won't have to worry about sin, because our nature in Christ isn't subject to sin.
I live and walk in righteousness. Satan has nothing in me because in Christ Jesus my Lord, I've been justified from all things from which I couldn't be justified by the Law of Moses. I walk conscious of the Father's nature in me. Hallelujah!
Further Study: Romans 4:6-8; Micah 7:18-19 AMPC