THE INTEGRITY PAPERS - pathos004einstein.htm

"Concepts which have proved useful for ordering things easily assume so great an authority over us, that we forget their terrestrial origin and accept them as unalterable facts. They then become labeled as `conceptual necessities,’ etc. The road of scientific progress is frequently blocked for long periods by such errors. It is therefore not just an idle game to exercise our ability to analyze familiar concepts, and to demonstrate the conditions on which this justification of their usefulness depends."
--Albert Einstein