"The present work was originally intended by us to be comprised in a second volume of The Principles of Mathematics. W…"

"We have found it necessary to give very full proofs, because otherwise it is scarcely possible to see what hypotheses…"

"From this proposition it will follow, when arithmetical addition has been defined, that 1 + 1 = 2."

"The above proposition [1 + 1 = 2] is occasionally useful."

"I can remember Bertrand Russell telling me of a horrible dream. He was in the top floor of the University Library, ab…"

"As a work in mathematics, Principia Mathematica soon became obsolete. Symbolic logic is also a field of philosophy, a…"

"He [Russell] said once, after some contact with the Chinese language, that he was horrified to find tha…"

"It takes a huge chunk of this volume just to prove that 1 + 1 = 2. And a large part of that proof revolves around the…"

"Are not gross Bodies and Light convertible into one another, and may not Bodies receive much of their Activity from t…"

"Have not the small Particles of Bodies certain Powers, Virtues, or Forces, by which they act at a distance, not only …"