In this paper I present an overview of my research in the philosophy of language in mind over more than thirty years, from my early work on speech act theory to my current work on mental files.The unifying theme is context-dependence,both in language and thought.I distinguish several varieties of context-dependence and,along the way,provide tentative accounts of various phenomena:performative utterances,indexicals,modulation (metonymy and loose talk,free enrichment),de se thought,the content of experiential states,and immunity to error through misidentification.