Symmetry - benchristel/benchristel.github.io GitHub Wiki
Michael Mehaffy points out that classical architects had a much more complex and nuanced view of symmetry than simplistic bilateral symmetry. See: https://www.youtube.com/watch?v=lE_MHZu0Qmk
In Code, translational and scaling symmetries are the most interesting. Bilateral symmetry occurs mainly in trivial/uninteresting cases, like matched parentheses or open and close operations on files.
Whitespace is used to make like things alike, and different things stand out. Recognizing patterns requires two things: first, consistency, so the pattern becomes apparent, and second, enough experience to recognize the patterns.