Nabeshima ware, a precious gift to power people of past era, tells a standard of what art should be, and could be.
i) art is beautiful.
Don't argue that it's a matter of course. Today there seems to be many of them which is praised not by its beauty but eccentricity. Then what is beauty? Simple. When the colour, shape, design and pattern is beautiful, it's beautiful. No need to be ambiguous.
ii) art is perfect.
Those splendid dish makers and designers must have been unyielding. They would spend as much time and effort as possible to achieve a perfect goal which never be truly reached, and in this tireless journey to perfection we will see the "Idea".
iii) art is proud.
We know artist is a human. Even if a work of art seems like a gift from heaven, the artist is dedicated to human kind, not to God. (God is to inspire them, not to order them.) Artist has reason to stand out to be admired by power people and common world. Besides these pride what else do they need to be motivated?
iv) art is unbreakable.
This is not the definition of art. But the fact Nabeshima ware was actually used to serve its own purpose is enlightening. Art in life or life in art, I should say. Such a great thing is you can put them into dish-washer and they might never broke!