Painting and sketching are the ways to express yourself. For some people it is their obsession, for others it is a way to relax their minds. While others consider it a way to make a connection with their inner-self. In any case sketching and painting are something intricate yet soothing and fascinating.
I believe that to display your art you do not have to be a great artist. You just have to draw you emotion and personality on paper.
There is something in painting and sketching that make the mind relax and at peace. Sketching is something that you do to express whats on your mind and in your heart. Most psychologists say that your drawing signifies soemthing in your life. So as painting, because of the colors and the calmness that it gives which name our mind relax.