...On the other hand, matter. It is clear that Newton was right only in the “local” world, where it was something that had mass, and in our, to put it mildly, moral weightlessness, this is not an argument. And yet, even though we no longer consider mass as a fundamental property of matter, it remains an important aspect of reality. Unless, of course, you perceive it in an altered state. So, “Subtle Physics.