He gave Gifford Lectures in 1996 and 1997, which were later published in 2000 as Emotion and Peace of Mind: From Stoic Agitation to Christian Temptation.
In den Jahren 1996 und 1997 hielt er die Gifford Lectures, die unter dem Titel Emotion and Peace of Mind: From Stoic Agitation to Christian Temptation im Jahr 2000 veröffentlicht wurden.