Kurt M. Koenigsberger comments in his 2003 book "Leaving Springfield" that "a good deal of enjoyment" is to be had from the episode, due to "the exposure of the hypocrisy behind 'the finance of salvation' and the ambivalent operations of the commercial world". Don Cupitt, a fellow of Emmanuel College, Cambridge, believes that when Lisa lectures Bart about the soul, she "shows a degree of theological sophistication which is simply not tolerated in Britain." Paul Bloom and David Pizarro wrote in the 2006 book "The Psychology of The Simpsons" that although Lisa does show "healthy religious skepticism" she still believes in an eternal soul. However, Lisa tells Bart at the end of the episode, "some philosophers believe that no one is born with a soul, you have to earn one through suffering". Bloom and Pizarro acknowledge: "Indeed, some philosophers and theologians say that without belief in a soul, one cannot make sense of the social concepts on which we rely, such as personal responsibility and freedom of the will."