Amos Vogel, Film as a Subversive Act (Weidenfeld and Nicolson, 1974), p22:
If these new forms and contents (discussed in the following chapters) prove unpalatable or unintelligible to some, the onus, as always, is not on the artist; he is merely the most nakedly sensitised antenna extended towards our collective secrets. In poetic, oblique, mysterious shapes he inevitably reflects (or prefigures) an era of disorientation, alienation, and social revolution and leads us to knowledge without utilising the tools of reason. It is up to us to learn to decipher his secret communications and warnings.