This is one way I help people grasp the wonder of the gospel:
When you stand before God on the great day of judgement and God says to you:
“This is my holy law. Now look at your life. How do you plead, guilty or not guilty?”
What will you say?
With your head down and with a heavy heart, “Guilty, my Lord”
“Now” says the Lord, “what is your plea?”
With your head up and with a faithful, joyful heart, “My plea is Jesus Christ. I know he loved me and gave his life for me. He died so that I might be forgiven.”