The following story was recounted by physicist Christopher Fuchs fairly recently in his massive 2014 arXiv paper My Struggles with the Block Universe: In 1972, the late physicist John Archibald Wheeler asked his students to write all the equations of physics they knew on sheets of paper, and he placed all the papers in front of the classroom of students, and he then repeatedly commanded the equations to fly. When the equations repeatedly failed to fly, he commented to the assembled students who must have been thinking that Wheeler had gone off his rocker: “You see, these equations can’t fly. But our universe flies. We’re still missing the single, simple ingredient that makes it all fly.” https://ncatlab.org/nlab/show/John+Wheeler
And also fairly recently, physicist Blake Stacey noted in 2016 that Wheeler had made the same point when he was interviewed in the documentary The Creation of the Universe (1985) (https://ncatlab.org/nlab/show/John+Wheeler):
There’s nothing deader than an equation. You write that down in a square on a tile floor. And on another tile on the floor you write down another equation, which you think might be a better description of the Universe. And you keep on writing down equations hoping to get a better and better equation for what the Universe is and does.
And then, when you’ve worked your way out to the end of the room and have to step out, you wave your wand and tell the equations to fly.
And not one of them will put on wings and fly.
Yet the Universe flies!
It has a life to it that no equation has, and that life to it is a life with which we are also tied up.
Nothing has changed since 2016. Wheeler nailed it when he noted that equations CAN’T represent a moving world. Despite maybe containing delta symbols which purport to represent number change, the equations of physics CAN’T represent a moving world. There exists no set of equations that can represent a moving system. Equations are not the type of thing that can be used to represent the source of movement.
“SPONTANEOUS electromagnetic radiation”, “dynamical wave-function COLLAPSE” (https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.132.250203 ) are all about movement aspects of the world that CAN’T be represented by equations. Nevertheless, physicists are seemingly continuing on their Quixotic quest to try to force equations to represent a moving world.
Similarly, equations can’t be forced to represent (the separate issue of) how the world knows itself, starting off with how it could be that at a very basic level the world knows its own categories and numbers.
The issue of how the world knows itself (consciousness) and the issue of how the world moves itself (in response to this knowledge of itself), are, clearly, TWO SEPARATE, BUT CONNECTED, ISSUES. But neither of these aspects of the world can be represented with equations.