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.
“People need to be made conscious of a very simple reality: we have no choice but to share this planet, this small blue sphere floating in the vast reaches of space, with all of our fellow 'passengers.'”