Isaiah 1:18-20 (NIV)
"Come now, let us reason together," says the Lord. "Though your sins are like scarlet, they shall be as white as snow; though they are red as crimson, they shall be like wool."
If you are willing and obedient, you will eat the best from the land; but if you resist and rebel, you will be devoured by the sword." For the mouth of the Lord has spoken.
If there were grievous differences between us, such that we were about to take our case into a courtroom before a judge, we might say something like, "Come now, let's talk about this, let's see if we can this out of court." This would be a reasonable thing to do.
God has a case against us. We have broken his law, but God is offering a settlement so that we do not have to go to court about it. Whatever it is, it is bound to be a good deal since we are most definitely guilty and have no reasonable defense.
So what's the deal? God says he is willing to give us a clean slate, total forgiveness. This comes completely at his expense, we pay nothing for it. The deal is, he requires that we be willing and obedient. We would be his, bought with a price. We do nothing to earn or deserve this deal other than to give up our rights totally and completely to Him. Oh and by the way, that is not a bad thing, we are not talking about a miserable existence here; we are talking the best of everything. It make sense, he owns it all, he has the resources. If we want to keep our rights then we will be, not might be, devoured by the sword.
I can reason about this. It's a no-brainer.