sentences:  Gombrich argues in "Precept and Practice" that, rather than being the mark of later corruptions of Theravada Buddhism, these practices can be traced to early periods in Buddhist history.Furthermore, since the worship of deities and rituals involving sorcery are never explicitly forbidden to lay people in the Pali Canon, Gombrich argues against viewing such practices as contradictory to orthodox Buddhism.It is also in "Precept and Practice" that Gombrich lays out his distinction between Buddhism at the cognitive level and Buddhism at the affective level.