There are not two realities; spirit and matter. There is but one Reality, and that is Spirit, or Pure Intelligence, playing itself as matter, in all its myriad forms, in the same way that pure gold can be fashioned into many forms, such as a chain, while all the time remaining pure gold. That Spirit does this is called lila and maya. The world we see as 'real' is but an illusion of the highest caliber. And so it is said:
"The Universe is The Absolute, as seen through the glass of Time, Space, and Causation"
Vivekenanda
re: 'standing waves': yes indeed; physics now sees all particles in the universe as none other than standing waves, having been created by fluctuations in their respective energy fields. And so the new science now turns its attention to fields and is called 'field theory'. There are no such 'material' particles. 'Material' reality is a virtual reality. Only That which is manifesting this 'material' world is real. Of course, the Hindus have told us this for over 4000 years. "That" is what they call 'Brahman'. It is also Tao, Unified Field, Void, Ground of All Being, God, Pure Abstract Intelligence, Pure Consciousness, The Changeless, etc.
Zen is the only spiritual practice I know of which marries The Miraculous with The Ordinary as One. IOW, there are no separate heavenly and earthly realms; there is just this world, here, now, an Earthly Paradise, if you will, The Miraculous found in Everything we see and experience. But due to our social conditioning, we fail to see it that way, and instead see the world as primarily an artifact, a made 'thing', lacking life or consciousness, either the outcome of some agent of creation, ie a 'Maker', or the outcome of blind, unintelligent forces.
