# Quote — Carl Sagan, Dragons of Eden

> There is no way to tell whether the patterns extracted by the right hemisphere are real or imagined without subjecting them to left-hemisphere scrutiny. On the other hand, mere critical thinking, without creative and intuitive insights, without the search for new patterns, is sterile and doomed. To solve complex problems in changing circumstances requires the activity of both cerebral hemispheres: the path to the future lies through the corpus callosum.

- Author: [Carl Sagan](https://www.leafyquotes.com/carl-sagan.md)
- Book: [Dragons of Eden](https://www.leafyquotes.com/carl-sagan/dragons-of-eden.md)
- Page: 190
- Source: [Wikiquote](https://en.wikiquote.org/wiki/Carl_Sagan#The_Dragons_of_Eden_(1977)) ([CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/))
- Quote page: https://www.leafyquotes.com/carl-sagan/dragons-of-eden/there-is-no-way

## More from this book

> A mutation in a DNA molecule within a chromosome of a skin cell in my index finger has no influence on heredity. Fingers are not involved, at least directly, in the propagation of the species.

p. 27 — [Quote page](https://www.leafyquotes.com/carl-sagan/dragons-of-eden/a-mutation-in-a-dna.md)

> There is a popular contention that half or more of the brain is unused. From an evolutionary point of view this would be quite extraordinary: why should it have evolved if it had no function? But actually the statement is made on very little evidence.

p. 31 — [Quote page](https://www.leafyquotes.com/carl-sagan/dragons-of-eden/there-is-a-popular.md)

> Absence of evidence is not evidence of absence.

p. 7 — [Quote page](https://www.leafyquotes.com/carl-sagan/dragons-of-eden/absence-of-evidence.md)