In a lot of Buddhist literature you will find passages suggesting that our Buddha nature is actually "nothingness" or "emptiness". I was wondering if this was true? I'm starting to doubt this claim because of the Dharmakaya. The Dharmakaya is one of the three bodies of Buddha which is transcendent. While some say that the Dharmakaya "is" nothingness, others claim that it is neither part of space (emptiness and form) nor time. The idea is that everything, including nothingness (emptiness), originated out of the Dharmakaya. It's an impersonal force which holds everything together, originated everything, and maintains everything through a transcendent state.
My question: What is the proper understanding of the Dharmakaya and it's relationship with our Buddha nature? Is it the Buddha nature or not?