The karma-rebirth doctrine is one of the core doctrines of the Buddhist worldview. Some forms of Western Buddhism emphasize doctrinal study and meditation practice over traditional Buddhist elements that have their foundation in the karma-rebirth doctrine, such as merit-making practices and other forms of ritual. Conversely, the worldwide Gelugpa Tibetan Buddhist Foundation for the Preservation of the Mahayana Tradition (FPMT) encourages its affiliates to perform traditional ritual such as chanting and pujas to make merit for oneself and others, in addition (...) to attending teachings and developing a regular meditation practice. During their exploration of the FPMT's activities, participants undergo a process of experimental validation of the teachings and practices, in which they come to accept doctrinal notions in one of two ways: the notion's capacity to validate and give meaning to personal experience, or to lend conceptual support to the newly acquired framework of ideas. Utilizing data obtained from fieldwork undertaken between 2003 and 2006 at Vajrayana Institute (VI), an FPMT centre in Sydney, Australia, I illustrate the way in which the karma-rebirth doctrine supports those aspects of the belief-system more capable of experiential validation through their capacity to frame and give meaning to personal experience. The acceptance of notions such as karma, rebirth and merit-making involves an interpretive shift from previously held notions about cause and effect and the nature of this-worldly existence, toward a Buddhist appreciation of these concepts. (shrink)