What most characterizes the artist is his power of pouring his expression into certain molds; which is strongly related to certain social inhibitions. As Delacroix says, artist has no inhibitions, usually possess a child-like openness and sincerity; and actually returns in a way to the innocence of childhood.
The artist is not afraid to expose himself, intends to produce a certain effect, an impression on his audience/readers/viewers. He/she has to move people in a way or another. And not only the actors/actresses do that, but also the writers, the painters, the sculptures, and most kind of artists or those who express do that.
Muller-Freinfels says that the artist's power of pouring expressions into molds is unequally distributed among artists. Some can express themselves better, are specialized in choosing the right forms, the proper "molds"; and some have a better content to express, and finally some have both of these in equal quantities.
The constituents and data of the art work must be first built up. In fact, on the artistic level, life and experience are possible only through the process of creation. The artistic image never is the representation of a thing. It is the artist's created representation of a thing which he intends to transmit.