Of all the sublime subjects tackled by Goodwin, this is among the best known and the most-often read. No matter how mature you are in your faith, Goodwin will open up a fresh, heavenly perspective that shows Christ at work from the beginning to the fulfillment of your life. He shows us the gospel in origin--as an eternal transaction among God the Father, God the Holy Spirit, and God the Son--for the salvation of man. Accomplishing salvation required a full and complete satisfaction for justice, something we could not do for ourselves. We need a mediator: first, someone who must be God, able to perfectly fulfill the broken promises of Adam\'s race; and second, a man to be a representative substitute for us. As our mediator must be both God and man, our only Mediator could be Christ.