Language is the main channel in which human beings share the contents of their consciousness. It offers a window into human nature, revealing the hidden workings of our thoughts, our emotions, and our social relationships. In his lecture, Prof Steven Pinker will explore an example of each: everyday metaphor as a window into human cognition; swearing and taboo words as a window into human emotion; and indirect speech-veiled threats and bribes, polite requests, and sexual come-ons as a window into human relationships. Professor Steven Pinker is the Johnstone Family Professor in the Department of Psychology at Harvard University. Until 2003, he taught in the Department of Brain and Cognitive Sciences at MIT. He conducts research on language and cognition, writes for publications such as the New York Times, Time, and Slate, and is the author of seven books, including The Language Instinct, How the Mind Works, Words and Rules, and The Blank Slate.Recorded on 6 June 2008 at the University of Edinburgh's McEwan Hall.