The art is very much the objective.
This objective derives from the very objective things - the laws of perceiving the world by the human eye, for example.
And the spirit ...
Who is able to read about the meaning and spirit of all can understand and even tell .
Only for this artist must possess the means to transmit these meanings properly.
If shorter: the "real" artist has something to tell the world and he knows how to do it.
"Not really" artists also come in two types - those who have nothing to say, and those who do not know how.