" In order that the concept of substance could originate--which is indispensable for logic although in the strictest sense nothing real corresponds to it--it was likewise necessary that for a long time one did not see or perceive the changes in things. The beings that did not see so precisely had an advantage over those who saw everything " in flux." At bottom, every high degree of caution in making inferences and every skeptical tendency constitute a great danger for life. No living beings would have survived if the opposite tendency--to affirm rather than suspend judgment, to err and make up things rather than wait, to assent rather than negate, to pass judgment rather than be just-- had not been bred to the point where it became extraordinarily strong. "