Aestheticism in literature refers to a movement that emphasizes the intrinsic value of art, prioritizing beauty, form, and sensory experience over moral, social, or political concerns. Here's a breakdown of important points related to Aesthetism and its role in literary criticism:
1. Philosophical Basis:
   - Aestheticism is rooted in the belief that the primary purpose of art is to provide beauty and pleasure, rather than to serve any didactic or moral function.
   - Influenced by the philosophy of Immanuel Kant and the idea of "art for art's sake," Aestheticism separates art from social, political, or utilitarian purposes.

2. Key Concepts:
   - Art for Art's Sake: This principle asserts that art should not be judged by its moral, social, or political message, but by its aesthetic qualities.
   - Autonomy of Art: Art is seen as an independent entity, free from any external purpose. Its value lies in its beauty, not its utility.
   - Sensory Experience: Aestheticism emphasizes the sensory experience of art—what it evokes in the viewer or reader in terms of emotions, imagination, and aesthetics.

3. Influence on Literature:
   - Aestheticism led to an emphasis on sensory language, elaborate descriptions, and attention to form and style.
   - Writers associated with this movement sought to evoke beauty in their writing through rich imagery, musicality of language, and symbolism.
   - Oscar Wilde, Walter Pater, and J.K. Huysmans were significant proponents of Aestheticism in literature.

4. Major Figures and Works:
   - Oscar Wilde: Known for works like The Picture of Dorian Gray and The Importance of Being Earnest, Wilde epitomized Aestheticism by combining wit, critique of Victorian society, and a celebration of beauty.
   - Walter Pater: His essay The Renaissance is a seminal work in Aestheticism, advocating the idea that life itself should be lived as a work of art.
   - Charles Baudelaire: His poetry in Les Fleurs du mal focused on the exploration of beauty, sin, and experience, often prioritizing aesthetic values over moral judgments.

5. Aestheticism vs. Moralism:
   - The movement was often criticized by moralists for its perceived neglect of ethics and social responsibility. Critics argued that the focus on beauty and form detracted from the real-world issues that literature could address.
   - Aestheticism deliberately rejected the moral didacticism that was prominent in Victorian literature, where writers often aimed to teach readers a moral lesson.

6. Aesthetic Criticism in Literary Theory:
   - Literary critics influenced by Aestheticism evaluate a work of art based on its beauty, structure, and emotional resonance, often ignoring or downplaying its ethical or social implications.
   - Critics such as T.S. Eliot and Harold Bloom later incorporated elements of aesthetic theory into their own analyses, though in different contexts.

7. Symbolism and Aestheticism:
   - Symbolism, which emerged in French poetry around the same time as Aestheticism, shares its focus on the beauty of form and sensory experience, often conveying complex emotional states through vivid images and symbols.
   - Stéphane Mallarmé and Paul Verlaine were key figures in this intersection between Aestheticism and Symbolism.

8. Legacy:
   - Aestheticism influenced later modernist movements, which also questioned the role of literature in society and sought to experiment with form and structure.
   - The movement’s emphasis on beauty, sensory experience, and the autonomy of art had lasting effects on both literary criticism and art in general.

In literary criticism, Aestheticism promotes an evaluative approach that emphasizes the artistic qualities of a work, often highlighting its stylistic innovations, its beauty, and its emotional impact over its moral, philosophical, or political messages.