Every behavior that we do, we do to reduce uncertainty. We do it to increase certainty. When you go down below in a boat and your eyes are moving and registering the boat, and your eyes are saying, "Oh, we're standing still," but your inner ears are saying, "No, no, we're moving." And your brain cannot deal with that conflict, so it gets ill. The stress resulting from uncertainty is tremendous in our society. It increases brain cell death. It decreases plasticity. It makes you a more extreme version of yourself. We do almost everything to avoid uncertainty. And yet the irony is that that's the only place we can go if we're ever going to see differently. And that's why creativity, seeing differently, always begins in the same way: it begins with a question. It begins with not knowing. It begins with a •why?'. It begins with a 'what if?'. And I should also say that these assumptions are essential for your survival. Every time you take a step your brain has hundreds of assumptions: that the floor is not going to give way, that your legs aren't going to give way, that that's not a hole, it's a surface. So these assumptions keep us alive. But they can also get in the way, because what was once useful may no longer be useful. So your brain evolved to evolve. It's adapted to adapt.