On Start the Week Andrew Marr explores goodness and its uneasy relationship with pleasure. The historian Robin Lane Fox looks to the work of Augustine and what is thought to be the first autobiography detailing the sinful excitement of youth before his anguished and hesitant conversion to Christianity. The philosopher Clare Carlisle explores Augustine's views on the link between desire and habit, while the psychoanalyst Adam Phillips asks why pleasure is more highly prized when it's perceived to be forbidden and guilty. Larissa MacFarquhar looks at the lives of those who have dedicated themselves to others and asks why do-gooders provoke deep suspicion in Western culture. Producer: Katy Hickman.