Reinforcement Quotes (2 quotes)
On principle no European traveler, especially the natural scientist, should travel otherwise than in the company of a native. This is essential, especially in view of his inability to make himself understood, to threaten to summon reinforcements when molested, or to recover forgotten pieces of clothing.
In Konrad Guenther, Georg Schweinfurth-Lebensbüd eines Afrikaforschers (1954), 317. As quoted and cited in Kathrin Fritsch, '"You Have Everything Confused And Mixed Up…!" Georg Schweinfurth, Knowledge And Cartography Of Africa In The 19th Century', History in Africa (2009), 36, 88.
Wheeler’s First Moral Principle: Never make a calculation until you know the answer. Make an estimate before every calculation, try a simple physical argument (symmetry! invariance! conservation!) before every derivation, guess the answer to every paradox and puzzle. Courage: No one else needs to know what the guess is. Therefore make it quickly, by instinct. A right guess reinforces this instinct. A wrong guess brings the refreshment of surprise. In either case life as a spacetime expert, however long, is more fun!
In E.F. Taylor and J.A. Wheeler, Spacetime Physics (1992), 20.