“Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it. When we enquire into any subject, the first thing we have to do is to know what books have treated of it. This leads us to look at catalogues, and at the backs of books in libraries.”

English writer and polymath

Samuel Johnson, often called Dr Johnson, was an English writer and polymath. He is best known for his Dictionary of the English Language, published in 1755, a work of 42,733 entries that shaped the study and use of English. Beyond the dictionary, Johnson wrote as a poet, playwright, essayist, moralist, literary critic, sermon writer, biographer, editor, and lexicographer. His reputation rests on the breadth of that work and on his lasting influence on the English language.