The court sentence for sin is eternal death.
What God
has to do is be 100% just, as in justice system, trial and sentence. What He
wants to do is be 100% merciful to our iniquities and remember our sins no more.
Satan insists God be 100% just, or God isn't the God He declares Himself to be.
But God is smarter than Satan and figured out a way to be both just and merciful to us.
Christ agreeing to assume our sins and our death sentence allows God to be 100% just and 100% merciful.
Justice or Mercy. < Our choice, which gives us 100% free will. Christ gave us the gift of eternal life without judgment. Why would
you choose to burn?