According to Buddhism mind is nothing but a complex compound of fleeting mental states. One unit of consciousness consists of three phases — arising … - Narada Maha Thera

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According to Buddhism mind is nothing but a complex compound of fleeting mental states. One unit of consciousness consists of three phases — arising or genesis (uppada) static or development (thiti), and cessation or dissolution (bhanga). Immediately after the cessation stage of a thought moment there occurs the genesis stage of the subsequent thought-moment. Each momentary consciousness of this ever-changing life-process, on passing away, transmits its whole energy, all the indelibly recorded impressions to its successor. Every fresh consciousness consists of the potentialities of its predecessors together with something more. There is therefore, a continuous flow of consciousness like a stream without any interruption. The subsequent thought moment is neither absolutely the same as its predecessor — since that which goes to make it up is not identical — nor entirely another — being the same continuity of Kamma energy. Here there is no identical being but there is an identity in process. Every moment there is birth, every moment there is death. The arising of one thought-moment means the passing away of another thought-moment and vice versa. In the course of one life-time there is momentary rebirth without a soul. It must not be understood that a consciousness is chopped up in bits and joined together like a train or a chain. But, on the contrary, "it persistently flows on like a river receiving from the tributary streams of sense constant accretions to its flood, and ever dispensing to the world without the thought-stuff it has gathered by the way."