Lexicography
Johnson's thoughts on biography and on poetry found their union in his understanding of what would make a good critic. His works were dominated with his intent to used them for literary criticism, including his Dictionary to which he wrote: "I lately published a Dictionary like those compiled by the academies of Italy and France, for the use of such as aspire to exactness of criticism, or elegance of style". Although the smaller dictionary was written for the masses and become the common household dictionary, Johnson's original dictionary was an academic tool that examined how words were used, especially those uses that were found in literary works. To achieve this purpose, Johnson included quotations from Bacon, Hooker, Milton, Shakespeare, Spenser, and many others from the literary fields that Johnson thought were most important: natural science, philosophy, poetry, and theology. These quotes and usages were all compared and carefully studied, so that others could understand what words meant in literature.
Johnson felt that words, in and of themselves, were meaningless, but that meaning comes from context. The only way to understand the word is to examine its usage, and a critic must understand lexicography before they can understand what people are saying. Later critics would attempt to create theories to analyze the aesthetics of literature, but Johnson was not a theorist and he used his ideas only for the practical purpose in order to better read the works. When it came to Shakespeare's plays, Johnson emphasized the role of a reader in understanding language when he wrote, "If Shakespeare has difficulties above other writers, it is to be imputed to the nature of his work, which required the use of common colloquial language, and consequently admitted many phrases allusive, elliptical, and proverbial, such as we speak and hear every hour without observing them".
Read more about this topic: Samuel Johnson's Literary Criticism