Underpinning the narrative dimension is the doctrinal dimension. Thus, in the Christian tradition, the story of Jesus’ life and the ritual of the communion service led to attempts to provide an analysis of the nature of the Divine Being which would preserve both the idea of the Incarnation (Jesus as God) and the belief in one God. The result was the doctrine of the Trinity, which sees God as three persons in one substance. Similarly, with the meeting between early Christianity and the great Graeco-Roman philosophical and intellectual heritage it became necessary to face questions about the ultimate meaning of creation, the inner nature of God, the notion of grace, the analysis of how Christ could be both God and human being, and so on. These concerns led to the elaboration of Christian doctrine. In the case of Buddhism, to take another example, doctrinal ideas were more crucial right from the start, for the Buddha himself presented a philosophical vision of the world which itself was an aid to salvation.