> […] it is both the part and the whole, simultaneously. […]
What is the Golden Mean and how might it be considered self-referential?
(symbol is 𝜑, the Greek letter "phi") is a special number approximately equal to 1,618. It appears many times in geometry, art, architecture and other areas. page 
\[\varphi = 1 + \frac{1}{\varphi} \]
So the Golden Ratio can be defined in terms of itself!
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FUHRMANN, Jan Tobias, 2023. Die Gewalt der Zwei-Seiten-Form: Von der Kritik der Zwei-Seiten-Form zur Viel-Seiten-Form der Kritik. Soziale Systeme. 25 June 2023. Vol. 28, no. 1, p. 163–201. DOI 10.1515/sosys-2023-0009. [Accessed 11 December 2023].