...each time I recollect Fragment 91 of Heraclitus, You never go down to the same stream twice, I admire his dialectical skill, for the facility with which we accept the first meaning ("The stream is another") clandestinely imposes upon us the second meaning ("I am another") and grants us the illusion of having invented it...
- Jorge Luis Borges, A New Refutation of Time
Geometrical optics shows how theories that explain many phenomena impressively and simply can still give a misleading picture...
- Julian Barbour, The End of Time
