Aureola enveloping the whole body, generally appears oval or elliptical in form, but occasionally depicted as circular, vesica piscis, or quatrefoil. When it appears merely as a luminous disk round the head, it is called specifically a "halo" or "nimbus", while the combination of nimbus and aureole is called a "glory". The strict distinction between nimbus and aureole is not commonly maintained, and the latter term is most frequently used to denote the radiance round the heads of saints, angels or Persons of the Trinity. This is not to be confused with the specific "motif" in art of the Infant Jesus
What Is Art? to justify their own tastes. Jahn notes the "often confusing use of categorisation" and the lack of definition of the key concept of emotion. Bayley writes that "the effectiveness of "What is Art?" lies not so much in its positive assertions as in its rejection of much that was taken for granted in the aesthetic theories of the time". Noyes criticises Tolstoy's dismissal of beauty, but states that, "despite its shortcomings", "What is Art?" "may be pronounced the most stimulating critical work of our time". Simmons mentions the "occasional brilliant passages" along with the "repetition, awkward language, and loose terminology".