I think you have to control the materials to an extent, but it's important to let the materials have a kind of power for themselves; like the natural power of gravity, if you are painting on a wall, it makes the paint trickle and it drips; there is no reason to fight that.
“When I first saw tap dancing, I immediately got it: the righteousness of being able to make so much noise with your feet!”
“All of the significant art of today stems from Conceptual art. This includes the art of installation, political, feminist and socially directed art.”