Christ came not only to fulfill the Mosaic Law but also to bring it to a new and higher standard. It is the new commandment of love. Love must not be mere words but must be active and genuine. The commandments are not simply impositions or demands.
Christ was the first one who showed what love is. “If God has loved us so much we too should love each other.” (1Jn 4:20) The law is summarized as love of God and love of neighbor. How do we know if we truly love God? It is measured by how much we love and forgive each other.