"I've got an out of class assignment for you to complete between now and next week, but I can't tell you the details of it. Just like today's class, this is one you're going to have to shape for yourselves.

"Much to the disappointment of Plato, there is a difference for most people between what we believe is right, and what we actually do. I, for example, am occasionally self-centred and insensitive, though I try not to be. This week I want you to choose one such behaviour pattern - that you personally do not like about yourself, and feel you would be a better person without - and try to go just one week without it. I don't necessarily expect you to succeed, but I do expect you to log your progress. Next week I want you all to report back, with the aim of exploring why knowing what is right and doing what is right are two different things."