God's plan is to fix everything! When God created the world, it was perfect. The relationship between God and man was perfect. The relationship between people was perfect. Nature was perfect. The minds and bodies of people were perfect.
The first people made wrong decision, and the corrupting influence, which Christians call "sin," was released into the world. The relationship between God and man was corrupted. The relationship between people was corrupted. Nature was corrupted. Minds and bodies were corrupted.
When people think of the gospel today, they focus primarily on bringing man into right relationship with God. Part of this focus could be man's ego-centric nature. And this is true. People do filter all phenomena through the lens of self. The main question they ask themselves is, "How does this affect me?"
Part of this focus is equally the prominence God gives people in his story. The Bible says that God gave rule of the world to people. God gave people the pivotal decision of walking with him and bringing life into the world, or walking away from him and bringing death and corrpuption into the world. And now, if we choose to walk with God, God's spiritual DNA is injected into people, and God's people are injected into the world. And through God's people, God's DNA is injected into the world and counteracts the corruption of sin.
Man's relationship wi5h God may not be all the story, but it is a central part of the story. Man becomes the conveyor of God's restoration given to the world through Jesus.
It is like man introduced a "sickness" into the world. This virus infected and damaged everything. So, God introduced an "anti-sickness" named Jesus to infect everything again, but to restore everything that was damaged by the first "sickness." And human beings are carriers of this "counter-sickness."