The document discusses two theories of the relationship between language and thought: the cloak theory, which posits that language reflects pre-existing thoughts, and the mould theory, which asserts that language shapes cognition. It presents examples, such as the Sapir-Whorf hypothesis, which suggest that speakers of different languages perceive reality differently, and critiques from Steven Pinker about the limits of these claims. The text concludes that while language influences thought, it does not completely determine it, highlighting the complexity of this relationship.