The Most High God is ruler over the realm of mankind.
And He is a just ruler, which means He believes in paying fair wages to all of those under His rule.
Now that sounds like a wonderful thing, except for one problem: The wages of sin is death.
And we have all sinned, which means, instead of God owing us beneficial compensation for our work, we all owe God a great debt for our sin. And since God is fair and just, that debt must be paid.
God does not, and cannot simply overlook sins, forget about them, or pretend like they’re not there. No; our debt must be paid. And since the wages of sin is death, that payment must be blood.
Now, God does indeed forgive sins, but only on the basis of legitimate payment for those sins. And the only legitimate payment by which we can be forgiven is the perfect blood of Jesus Christ, who died in the place of sinners. Through Jesus Christ, full forgiveness of sins is available to even the vilest offenders against God—even sinners as wicked as I am, and as you are.
If you are in Christ Jesus, your sins are forgiven. Fully paid. Your debt has been canceled. You have been saved from the wrath to come, and there is now no condemnation for you.