The mural contains several signs that refers to political and social issues, like the fear used to easily control people and take them to accept solutions that they may normally resist. For instance the fear of terrorism permits higher surveillance measures. For more infos, read the article from Barbara Picci
Among other references and symbols artist features WikiLeaks symbol as relation to rare authentic documents of human history of greed, destruction. Truth becomes vital for understanding and evolving as a society to achieve something better for the future.
There is also the lure of something positive.
He says: “To sustain a healthy society, critical and free thought must be nurtured and given space to grow.”