[wfn]

Just a note to some people replying to 'bkst: what Berkeley developed was a kind of monistic (not dualistic) system. Some may be committing a kind of false dychotomy by thinking "huh someone is saying consciousness is separate from matter, must be a dualist" (or if they're not aware of the history of Cartesian etc thought, automatically assign some kind of vague "theist" property to that person); when in fact Berkeley wanted to do away with the concept of matter altogether (in a manner of speaking - at the very least to diffuse the ontological charge normally associated with that term.) Just a (possibly confusing) clarification re. Berkeley and dualism.