In the case of the film, too, the freedom from the physical forms of space, time, and causality does not mean any liberation from this esthetic bondage either.

On the contrary, just as music is surrounded by more technical rules than literature, the photoplay must be held together by the esthetic demands still more firmly than is the drama.

The arts which are subordinated to the conditions of space, time, and causality find a certain firmness of structure in these material forms which contain an element of outer connectedness.

But where these forms are given up and where the freedom of mental play replaces their outer necessity, everything would fall asunder if the esthetic unity were disregarded.
This unity is, first of all, the unity of action.

The demand for it is the same which we know from the drama.