What is reality?

Interesting post on WorldChanging, apparently taken from Richard Dawkins' speech at TED, 　a website worth checking out by the way. Reality is relative, because of our limited perception of it: our reality is not that of a mole's. Our brain is a tool for survival, and therefore we need to know only what we need to know. So it is said.

--In other words, reality as an object is only defined by what we, the subject, perceive it to be. Reality's relativity is therefore based on the variableness of the subject. The subject becomes its criterion?--

So, Dawkins continues, to get a better grasp of actual reality, we should expand our imagination.

--I'm having trouble with the notion of an actual reality. In case reality is relative, is the notion of an actual reality possible outside of our cognitive framework? I wonder, isn't that imagination born within that same limitation? Is there actually room for growth and expansion? Or should we instead consider imagination as some gateway to go beyond our own boundaries? Or, in other words: is there hope?--

richard, dawkins, ted, reality