The now is an ever fizzing source, bit is time itself only in the very centre of the moment. Durational time depends on memory which is a power essential to living, but memory cannot hold the living present, not even an image of it, only a 'representation' of it. What there is is a peculiar certainty that the present 'I' is identical to the 'I' of a moment ago, and of any past time. This is an unwarranted and unnecessary inference.