CJ's enlightening on "the quality of"

Hello,

Could any native speaker deal with it to help me?
Thank you for your help.

A. Quoted from the suggestions of CJ:
There are many qualities. Good, bad, not so good, not so bad, extremely good, extremely bad, about average.
There are many entities that can be judged according to their quality. Service, materials, performance, clothing, food.
You can put "quality of" with any of these to refer to a judgment - the degree to which these things are good or not good.

The quality of the service was very good.
The quality of the food was very bad.
The quality of the president's clothing was about average.

So 'the quality of' is like 'the goodness judgment about'.

B. probe philosophy of his lines:
1. There are many entities that can be judged according to their quality-----one of lower or higher quality accorsing to one's quality or the quality of one

2. You can put "quality of" with any of these to refer to a judgment - the degree to which these things are good or not good. ---- "quality of" used to show "one" reaching as far as what degree of the quality

3. the logic order of judging any entities and the end of the quality:

• the first step: one reaching as far as what degree of the quality-----at the time the common language is "the quality of one" (here, the "of" shows the one is for making the quality)
• the second step: to show a result of a judgment about one's quality----at the time the common language is "one of lower or of higher quality"----that means one having / with lower or higher quality
• the third step: the quality can mark / typify / characterize the one, because the one typically has this quality

At the time, the quality becomes a living party to which the one is attributed.
one typically has the quality-----the quality can be used to form / make / mark / typify / sign / characterize the one
Kindness is one of his best attributes. (= Kindness is one of best attributes to mark / to form / to make him) (or He is attributed to kindness.)
(here, the "his" not do modify but acts as a receiver) Let's see the definition of "attribute": a quality forming part of the nature of a person or thing.

Good planning is one of the characteristics "of" a successful business. (the "of" shows that the characteristics mark / form a successful business or a successful business is attributed to the characteristics )

She shows qualities of leadership. = She shows qualities of leadership to which she is attributed / which forms / makes / marks her.