This thesis is a comparative study of the meaning of religious conversion in Sri Aurobindo and Bernard Lonergan. As such it is a contribution to the question of interreligious dialogue in fundamental theology. It is an effort to compare two strains of thought, Roman Catholic theology of Bernard Lonergan and the Neo-Vedanta of Aurobindo, by selecting a representative from each religious tradition and making a comparison of the philosophical and theological approach in each. The author’s goal is to look at each system in its overall structure and at the metaphysics underlying each system: in the case of Lonergan it is his critical realism, in the case of Aurobindo it is a kind of philosophical monism which has some affinity with Bergson.