The Buddhist Teachings on Rebirth
Moment to moment, lifetime to lifetime — death and rebirth are happening all the time.
The Dalai Lama--Thoughts on Rebirth
Among the ancient schools of thought, which accepted the notion of continuity of consciousness, there were several non- Buddhist philosophical schools which regarded the entity, the ‘I’ or ‘self,’ which migrated from existence to existence as being unitary and permanent. They also suggested that this ‘self’ was autonomous in its relationship to the psycho-physical components that constitute a person. In other words they believed or posited that there is an essence or ‘soul’ of the person, which exists independently from the body and the mind of the person.
However, Buddhist philosophy does not accept the existence of such an independent, autonomous entity. In the Buddhist view, the self or the person is understood in terms of a dynamic interdependent relationship of both mental and physical attributes, that is to say the psycho-physical components which constitute a person. In other words our sense of self can, upon examination, be seen as a complex flow of mental and physical events, clustered in clearly identifiable patterns, including our physical features, instincts, emotions, and attitudes, etc., continuing through time. Further, according to Prasangika-Madhyamaka philosophy, which has become the prevailing philosophical view of Tibetan Buddhism today, this sense of self is simply a mental construct, a mere label given to this cluster of dependently arising mental and physical events in dependence on their continuity.
The notion that there is a connection between this life and the events of both our previous existence and our future existence, follows from the Buddhist understanding of the natural law of cause and effect. For example, although we can speak of yesterday’s weather and today’s weather as distinct, today’s weather is inextricably linked with the weather patterns of yesterday. Even at the bodily level, in the case of our physical health for example, we know that events in the past affect the present and those of the present the future. Similarly, in the realm of consciousness the Buddhist view is that there is also this same causal continuum between the events of the past, present and future.