What you spend years building may be destroyed overnight; build it anyway.

Got to fight to control the violent side, every day and night.

Air power may either end war or end civilization.

Fancy cutting down all those beautiful trees...to make pulp for those bloody newspapers, and calling it civilisation.

Mankind has never been in this position before. Without having improved appreciably in virtue or enjoying wiser guidance, it has got into its hands for the first time the tools by which it can unfailingly accomplish its own extermination.

Every civilization carries the seeds of its own destruction, and the same cycle shows in them all. The Republic is born, flourishes, decays into plutocracy, and is captured by the shoemaker whom the mercenaries and millionaires make into a king. The people invent their oppressors, and the oppressors serve the function for which they are invented.