“Everything is theoretically impossible, until it is done. One could write a history of science in reverse by assembling the solemn pronouncements of highest authority about what could not be done and could never happen.”

“Everything is theoretically impossible, until it is done.”

“He became convinced that ordinary commercial financing could be done for a service charge plus an insurance fee amounting to much less that the current rates of interest charged by banks, whose rates were based on supply and demand, treating money as a commodity rather than as a sovereign state's means of exchange.”

“Always listen to experts. They'll tell you what can't be done, and why. Then do it.”

“But if you didn't have more urgent things to do after supper [in boot camp], you could write a letter, loaf, gossip, discuss the myriad mental shortcomings of sergeants and, dearest of all, talk about the female of the species (we became convinced that there was no such creatures, just mythology created by inflamed imaginations - one boy in our company claimed to have seen a girl, over at regimental headquarters; he was unanimously judged a liar and a braggart).”

“We organized First and Second Volunteer Defense Gunners of Free Luna-two regiments so that First could snub lowly Second and Second could be jealous of First.”

“Every time we killed a thousand Bugs at a cost of one M.I. it was a net victory for the Bugs. We were learning, expensively, just how efficient a total communism can be when used by a people actually adapted to it by evolution; the Bug commisars didn't care any more about expending soldiers than we cared about expending ammo. Perhaps we could have figured this out about the Bugs by noting the grief the Chinese Hegemony gave the Russo-Anglo-American Alliance; however the trouble with 'lessons from history' is that we usually read them best after falling flat on our chins.”