# Quote — George Pólya, How to Solve It

> Analogy pervades all our thinking, our everyday speech and our trivial conclusions as well as artistic ways of expression and the highest scientific achievements.

- Author: [George Pólya](https://www.leafyquotes.com/george-polya.md)
- Book: [How to Solve It](https://www.leafyquotes.com/george-polya/how-to-solve-it.md)
- Page: 37
- Source: [Wikiquote](https://en.wikiquote.org/wiki/George_P%C3%B3lya#How_to_Solve_It_(1945)) ([CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/))
- Quote page: https://www.leafyquotes.com/george-polya/how-to-solve-it/analogy-pervades-all

## More from this book

> We need heuristic reasoning when we construct a strict proof as we need scaffolding when we erect a building.

p. 113 — [Quote page](https://www.leafyquotes.com/george-polya/how-to-solve-it/we-need-heuristic.md)

> Euclid's manner of exposition, progressing relentlessly from the data to the unknown and from the hypothesis to the conclusion, is perfect for checking the argument in detail but far from being perfect for making understandable the main line of the argument.

p. 70 — [Quote page](https://www.leafyquotes.com/george-polya/how-to-solve-it/euclids-manner-of-exposition.md)

> To write and speak correctly is certainly necessary; but it is not sufficient. A derivation correctly presented in the book or on the blackboard may be inaccessible and uninstructive, if the purpose of the successive steps is incomprehensible, if the reader or listener cannot understand how it was humanly possible to find such an argument....

p. 207 — [Quote page](https://www.leafyquotes.com/george-polya/how-to-solve-it/to-write-and.md)