Gadamer (1989: xxxiii) describes hermeneutics as ‘a theory of the real experience that thinking is’. In this chapter, we explore two main aspects of this experience of thinking - interpretation and understanding. We draw on the work of Schleiermacher (1768-1834) to review the origins of modern hermeneutics as an activity of interpretation, and on Heidegger (1889-1976) and Gadamer (1900-2002) for hermeneutics as a philosophy of understanding. We consider the ways in which Ricoeur (1913-2005) and Habermas (1929-) move hermeneutics towards critical theory, challenging the trustworthiness of text and the possibility of understanding, and urging reflection on their ideological construction and motivation. We use the most famous idea in the h...