In this article the concept of authenticity is explored within an educational context, using examples from the lives and work of teachers to illustrate the many qualities, dimensions and complexities involved in striving to be true to oneself. In educational settings authenticity has been aligned with personal commitment, meaningful contexts, realistic intentions, respect for students and on-going professional development. In essence, general fulfilment is attained when values pertaining to teachers' personal and professional selves are in unison; when "what I am" and "what I do" are as true to ones nature as they can possibly be. By recognising and acknowledging authenticity as a personal process of engagement, manifested in teachers' lives and work, we may acquire a deeper understanding of the kinds of practices and pedagogical encounters that enhance, or even limit, student and teacher development.