"If we were bees, ants, or Lacedaemonian warriors, to whom personal fear does not exist and cowardice is the most shameful thing in the world, warring would go on forever. But luckily we are only men —…"

"What we observe as material bodies and forces are nothing but shapes and variations in the structure of space. Particles are just schaumkommen (appearances)!"

"We are all stardust."

"The world is much stranger than we can imagine."

"If you cannot explain it simply, you do not understand it well enough."