Prophecy 215 "Simon Newcomb, famous American astronomer, on the possibilities of flight: No possible combination of known substances, known forms of machinery and known forms of force, can be united in a practical machine by which men shall fly long distances." Toffler, Future Shock. A prophet who wasn't.
Prophets 122 "All the armed prophets conquered, all the unarmed ones perished." Machiavelli. 1513. Gross, ed.