As the manifestation of the impermanence of life, death is not a one-time event but occurs at every moment of life. Since the aggregates are in a state of constant flux, birth (seen as arising) and death (seen as passing away) are always present in juxtaposition to each other. These momentary lives and deaths are one phase of the cycle. From another perspective death is nothing but the arising of the new state in place of the preceding one. This may be explained by means of an analogy with a house-gate. To one who is outside the house the gate is an entrance, whereas to the one inside the house it is an exit. But for both of them it is the same gate. Similarly, the preceding state in the cause and effect process is called birth, whereas its following state is viewed as death, although both of them belong to the same single process.