"The Spirit of the LORD is on me, because he has anointed me to preach good news to the poor. He has sent me to proclaim freedom for the prisoners and recovery of sight for the blind, to release the oppressed, to proclaim the year of the LORD's favor."
The Gospel isn't simply about forgiveness. Those who believe that the Gospel is that Christ died on a cross in order to forgive sins only understand half of what the Gospel is. This verse points to so many various things that Jesus did in His ministry in fulfillment of the law and prophets, all of which can be summed up in one word: reconciliation. Yes, Jesus has paid the penalty for our sins in order that we may live, but more than that, so that we might live unto and through Him in right relationship with God our Father.
Jesus came to bring restoration of this world back to the way it was in the beginning, to rightfully restore us back to a place of dominion over all of the Earth as it's stewards, and to condemn that usurper who took from us our dominion and enslaved us by deceiving us into obeying him rather than God, the prince of this world, Satan.
Do not forget: We are agents, ambassadors for Christ, spreading the ministry of reconciliation which He started and has set in our hearts so that He may continue to work through his body on Earth, the Church.