John Dewey, from his 1934 treatise, Art as Experience.
"The function of criticism is the reeducation of perception of works of art; it is an auxiliary in the process, a difficult process, of learning to see and hear. The conception that its business is to appraise, to judge in the legal and moral sense, arrests the perception of those who are influenced by the criticism that assumes this task. The moral office of criticism is performed indirectly. The individual who has an enlarged and quickened experience is one who should make for himself his own appraisal. The way to help him is through the expansion of his own experience by the work of art to which criticism is subsidiary. The moral function of art itself is to remove prejudice, do away with the scales that keep the eye from seeing, tear away the veils due to wont and custom, perfect the power to perceive. The critic's office is to further this work, performed by the object of art. Obtrusion of his own approvals and condemnations, appraisals and ratings, is sign of failure to apprehend and perform the function of becoming a factor in the development of sincere personal experience. We lay hold of the full import of a work of art only as we go through in our own vital processes the processes the artist went through in producing the work. It is the critic's privilege to share in the promotion of this active process. His condemnation is that he so often arrests it."