Active voice is a grammatical voice common in many of the world's languages. It is the unmarked voice for clauses featuring a transitive verb in nominative–accusative languages, including English and most other Indo-European languages.

Active voice is used in a clause whose subject expresses the agent of the main verb. That is, the subject does the action designated by the verb. A sentence whose agent is marked as grammatical subject is called an active sentence. In contrast, a sentence in which the subject has the role of patient or theme is called a passive sentence, and its verb is expressed in passive voice. Many languages have both an active and a passive voice; this allows for greater flexibility in sentence construction, as either the semantic agent or patient may take the syntactic role of subject.

In the following examples the active and passive voice are illustrated with pairs of sentences using the same transitive verb.

Harold Bloom (born July 11, 1930) is an American literary critic and is Sterling Professor of Humanities at Yale University. Since the publication of his first book in 1959, Bloom has written more than 20 books of literary criticism, several books discussing religion, and one novel. He has edited hundreds of anthologies.

Bloom teaches two classes at Yale: one on the plays of William Shakespeare; the other on poetry from Geoffrey Chaucer to Hart Crane. Some of his writing had reflected this teaching, from Shakespeare: The Invention of the Human (1998) to The Anatomy of Influence (2011), which he has called the summa of his career.

Bloom's career began with decades of studying the Romantic poets, in particular Percy Bysshe Shelley, W. B. Yeats and Wallace Stevens. From this study, combined with the influence of Freud, Emerson and many others, Bloom developed theories of poetic influence, marked by the publication of The Anxiety of Influence (1973). These theories dominated his writing for a decade, after which he began to focus on what he named "religious criticism", in books such as The Book of J (1990) and The American Religion (1992). Another shift in his career began with an impassioned defense of the non-politicised teaching of canonical literature in The Western Canon (1994). He has continued his religious criticism in books such as Jesus and Yahweh (2005) and The Shadow of a Great Rock: A Literary Appreciation of The King James Bible (2011).