Puzzles for the mind
There is more than one way to see everything, in fact ultimately there are inevitably at least two ways when “everything” runs the gamut of all that which exists to the reflective contrast of non-existence. The latter might be the shape of the former, if you think about it.
As I write this, I am looking at my keyboard and monitor, which have a defined physical existence that is accessible to all of my five senses by way of sight, hearing, touch, taste, and smell. What is invisible to the senses, however, is the shape that extends beyond the physical limits of my monitor and keyboard. I have no way of knowing how far the shape of my keyboard and monitor extend beyond the physical; I might presume the extent is minimal but that is unknowable (and more so, the more we learn about quantum entanglement and its vast distances).
Both monitor and keyboard are rectangular and rectangle is a shape – which cannot be seen, heard, touched, tasted, or smelled. Rectangle is invisible, there is no physical “thing” that is rectangle alone and nothing else. Rectangle isn’t accessible to our senses, in contrast to all physical things which are sensible.
All physical things are limited to equal measures of action and reaction, and to entropy. In a four-dimensional physical calculus in a cubic sine wave, is shape the integral factor, or the derivative of the limits?