III. The Origin of Suffering
Life means that new substances are formed and old ones thrown off. But life is not yet either sensation or consciousness. Certain scientists fail to understand sensation and ascribe it to plants that have life but not sensation. This childish notion comes about because there are plants that close their leaves and blossoms in response to external stimuli. One could just as well ascribe sensation to blue litmus paper that turns red in response to external stimuli, or to chemical substance as they too react to certain influences. But that is not enough.
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