What Is Art?is an 1897 philosophical treatise byLeo Tolstoythat lays out his philosophy of aesthetics. Rejecting notions of aesthetics that center around beauty, Tolstoy instead posits that art is defined by its role in transmitting feelings between human beings. Furthermore, he argues that the quality of art is not assessed by the pleasure it gives, but whether the feelings the art evokes align with the meaning of life revealed by...