"The clock... is a piece of power-machinery whose "product" is seconds and minutes: by its essential nature it dissociated time from human events and helped create the belief in an independent world of mathematically measurable sequences: the special world of science. ...while human life has regularities of its own... time is measured not by the calendar but by the events that occupy it. ...if growth has its own duration and regularities, behind it are not simply matter and motion but the facts of development: in short, history. And while mechanical time is strung out in a succession of mathematically isolated instants, organic time—what Bergson calls duration—is cumulative in its effects. ...organic time moves only in one direction—through the cycle of birth, growth, development, decay, and death—and the past that is already dead remains present in the future that has still to be born."