"To be passionate about teaching is not only to express enthusiasm but also to enact it in a principled, values-led, intelligent way. All effective teachers have a passion for their subject, a passion for their pupils and a passionate belief that who they are and how they teach can make a difference in their pupils' lives, both in the moment of teaching and in the days, weeks, months and even years afterwards". 

Christopher Day - 'Passion for Teaching' (2004)