The Gospel is the heart of God extending His mercy, grace and love to each one of us forgiving us of our sins. One of the deepest longings of the soul is to know forgiveness. Charles Spurgeon tells of his quest to find forgiveness of sin. He went to many different churches and heard many wonderful truths, but the one that would still his soul. Jesus came to pay the penalty of our sin.
Forgiveness is costly.
It costs God everything. Jesus died to pay the penalty of our sin. He poured out His blood on the Cross. But He loves us so much that He is willing to make this ultimate sacrifice so that we can have a restored relationship with Him. And peace with those who have offended us comes about because of forgiveness.