First published in 1964, The Art of Discrimination is a study in the relation between critical theory and practice, taking as its test-case James Thomson’s The Seasons, the poem which was, according to Johnson, of "a new kind". Professor Cohen explores the different applications of criticism from 1750 to 1950, analysing specific interpretations of the poem that altered, contradicted or supported poetic theory. In doing so, he introduces new techniques to supplement traditional critical commentary: illustrations are treated as interpretations and critical language is related to non-literary as well as literary information. In treating the history of critical interpretation, the reprinting of editions and past interpretations are considered along with contemporary statements as necessary to define a literary period. The book offers alternatives to theories of organicism and to those of the arbitrariness of literary history by defining the kinds of continuities that exist in criticism. As analysis of criticism, it studies how men think about literature, the extent to which such thinking resists systematization and those elements in it which can be controlled and organized and transmitted. The book will appeal to students of literature and critical theory.

The Old South Church is also known as the Third Church of Christ in Boston.