"As the [nineteenth] century progressed, we find that truth itself tended to be regarded no longer as eternal and changeless but as time-dependent. Attention came to be focused on the historical process rather than on an eternally valid, unchanging order of things. In other words, interest was transferred from the 'thing completed' to the genetic process, that is, from 'being' to 'becoming'. This radically new point of view received its extreme formulation in the philosophy of the 'modern Heraclitus', Henri Bergson... for whom ultimate reality was neither 'being' nor 'being changed' but the continual process of 'change' itself, which he called la durée."