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Measure/Ratio/Proportions/Feynman: since every relationship is largely close to a rational relationship, we can treat every relationship as precisely as we wish.
Proportionality/To the Square/Feynman/(s): proportionality is not simply about "correspondence", otherwise we could say that it did not matter whether something is proportional to the simple or the square. It is rather about the fact that the sizes are the same, if different baselines are chosen._____________Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution.
Vom Wesen physikalischer Gesetze München 1993
Vorlesungen über Physik I München 2001