De se statements are emphatic assertions in which speakers make fundamental claims about either themselves or others. In English, they are usually conveyed via "I" statements or third person reflexive pronouns, such as "she herself," or "he himself." De se attitudes appear often in our day-to-day lives, but they also pose a series of challenging problems for both linguists and philosophers. This interdisciplinary volume teases out what de se attitudes connote linguistically and also what these statements reveal about how humans think about themselves and how they understand the world around them.