God delegates free will with the certainty that you will make mistakes. Hopefully not serious ones. Mistakes that teach what not to do next time. For the serious mistakes, he offered his Son to pay for all those sins that will inevitably occur. In exchange for shouldering that burden, his Son is delegated the right to forgive sins and welcome you back into His Father's house. The principles are simple and elegant, but many will still fail to accept the offer.
"For the serious mistakes, he offered his Son to pay for all those sins that will inevitably occur."
To pay whom, precisely?
And why does this person need to be paid?