Since when did a mathematician need any tools but his own head? Pythagoras had done well enough with a stick and a stretch of sand.


Chapter 4, Boy meets Girl (p. 45) - Beyond This Horizon (1948; originally serialized in 1942)

Robert A. Heinlein Quotes

Since when did a mathematician need any tools but his own head? Pythagoras had done well enough with a stick and a stretch of sand.

Since when did a mathematician need any tools but his own head? Pythagoras had done well enough with a stick and a stretch of sand.

Since when did a mathematician need any tools but his own head? Pythagoras had done well enough with a stick and a stretch of sand.

Since when did a mathematician need any tools but his own head? Pythagoras had done well enough with a stick and a stretch of sand.