Any masterpeace of painting, ( as well as any other congenial work of poetry, philosophy, music, science...) shows us as well, that the rules for it`s creation are continuous and independent of some short - time fancy.
The common interpretation of their use and value depends on the character of a society .

If the observer want to claim for himself some sense of direction,
he should not forget about the continuance and lasting
of any mental attitude he is occupied with.
Still the stone carved portraits of threethousand years of egyptian culture, still the thoughts of Lao Tse demonstrate this...somethousand years later.