'With Bergson, we cannot expect either the current contentions of psychology, biology or physics, correct ethical or aesthetic judgement, or indeed the claims of historians, to remain absolutely stable. Most importantly, we certainly cannot expect the currently accepted means by which knowledge in any of these fields (or their progeny) is established to persist indefinitely. Bergson's philosophy speaks to current modes of historical investigation - not least in its assertion that all experience (including that on which the claims of physical science are based) is in some sense that of a past (Bergson [1896] 1988, 71-76; Amad 2010, esp. 117-123 and 166-170).'