ARE REBIRTHS physical or metaphors in this life alone?

The theme or belief of reincarnation is clearly reflected in the Upanishads through the concept of 'Samsara', which means wandering or world. It is the concept that every living being will, after death, come back to life on this Earth in some form, be it animal or human. The cycle of death and reincarnation is never-ending. The circumstances the individual will be born into, in his next life, depends upon his acts from his previous life.