" We are angry because we would like to change something in the world (or maybe in ourselves), something that seems to be unjust. A feeling of rage doe very little to rectify the perceived injustice. An artist sees the world and notices a difference between how she feels it should be and how it actually is. The work of art she creates is a way of bridging the gap: a physical manifestation of that discrepancy. The emotions she experiences, which might of course, be very pleasant and far from anger, are nonetheless channeled into something constructive, and the observer of the final piece might be challenged to pay attention to the issues in question and align himself with the artist's motivations. "

― Derren Brown , Happy: Why More or Less Everything is Absolutely Fine