In the first chapter of “Engaging God’s World”, Plantinga seems to emphasize the desire of longing that fills every soul; a desire for something more; something that material things cannot fulfill. This longing is met only through our Lord and savior Jesus Christ. Only the Lord’s sheep ever have this longing fulfilled. The reprobate’s hearts are hardened so that they hate God and His Son. Romans 8:7 says, “The carnal mind is enmity against God.” A fallen man does not want God.
A point that I thought that Plantinga emphasized very well was that we are made for God. God made us to serve him faithfully, that is the calling of every being on this earth from plant, to animal, to human. We are to glorify God in everything that we do because that is what he made us for.