1. Response to Stephen Gosson - This refers to "Defence of Poesie" or "Apology for Poetry" by Philip Sidney. Philip Sidney wrote this work as a response to Stephen Gosson’s attack on poetry.
2. The Individual Talent - This is a part of the essay "Tradition and the Individual Talent" by T.S. Eliot. This essay outlines Eliot's critical theory.
3. Catharsis - The concept of catharsis, which refers to the emotional release experienced by the audience of a tragedy, is a key idea in the works of Aristotle. He discusses this concept extensively in his work "Poetics".
4. Sweetness and Light - This phrase is associated with Matthew Arnold. He used it in his book "Culture and Anarchy" to describe the desirable qualities of culture.