The Gospel of Jesus Christ is good news. The entire message refers to the grace of God who so loved the world that He gave His only begotten Son (Jesus the Christ) that whosoever believes (puts their trust in Him and His work of salvation) should not perish but have everlasting life. The message is the life of Christ, His death, burial, and resurrection. It's a powerful message of the unconditional love of God, and every part of it must be preached. Why? It leads to salvation. That's right. In the Gospel message is persuading influence to save.