Emptiness is the key – the clear, empty mind. Whatever you observe becomes the whole content of the mind. You gain access into a totally new dimension from which all these things arise. In Buddhist terms, this is the unborn, uncreated, unmanifest which is the essence of everything. You can observe the whole world arising – a very interesting process. You can see the falsity and the delusory duality in it, and the manifestations of different forms of the same thing.