I think the best decribes what the reality is can be found the word "MYOHO" which means, literally, the " Mystic LAw". The LAw or the ultimate reality, is decribe as "myo"(mystic) because it is infinitely profound and beyond all the possible conceptions or formulations of the Human mind Nicheren Daishonin clarifies this point:

" What then does myo signify? It is simply the mysterious nature of our lives from moment to moment, which the mind cannot comprehend nor words express. When you look into your own mind at any moment, you perceive neither color nor form to verify that it exists. Yet you still cannot say it does not exist, for many differing thoughts continually occur to you. Life is indeed an elusive reality that transcends both the words and concepts of existence and nonexistence. It is neither existence nor nonexistence, yet exhibits the qualities of both. It is the mystic entity of the Middle Way that is the reality of all things. Myo is the name given to the mystic nature of life, and ho to its manifestations. "

Here the Daishonin is interpreting myo as the Ultimate reality which is beyond our ability to percieve and ho as the world of phenomena in all its ever-changing forms. The union of these two concepts, as represented by the single word myoho, reflects the essential oneness of the ultimate reality and the mnifest world. In other words, according to Buddhism there is no fundamental distinction between Ultimate reality and the everyday one.