“Scientifically speaking, a butterfly is at least as mysterious as a superstring.”
Source: Infinite in All Directions (1988), Ch. 2 : Butterflies and Superstrings, p. 14
Context: Scientifically speaking, a butterfly is at least as mysterious as a superstring. When something ceases to be mysterious it ceases to be of absorbing interest to scientists. Almost all things scientists think and dream about are mysterious.
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Freeman Dyson 90
theoretical physicist and mathematician 1923Related quotes

"Foreword to an Exhibit: I" (1944)
Context: Art is a mystery.
A mystery is something immeasurable.
In so far as every child and woman and man may be immeasurable, art is the mystery of every man and woman and child. In so far as a human being is an artist, skies and mountains and oceans and thunderbolts and butterflies are immeasurable; and art is every mystery of nature. Nothing measurable can be alive; nothing which is not alive can be art; nothing which cannot be art is true: and everything untrue doesn’t matter a very good God damn...

Quote, c. 1910; as cited by de:Wolf-Dieter Dube, in Expressionism; Praeger Publishers, New York, 1973, p. 112
1910 - 1915

"Physics and Reality" in the Journal of the Franklin Institute Vol. 221, Issue 3 (March 1936), Pages 349-382
1930s
Context: It has often been said, and certainly not without justification, that the man of science is a poor philosopher. Why then should it not be the right thing for the physicist to let the philosopher do the philosophizing? Such might indeed be the right thing to do at a time when the physicist believes he has at his disposal a rigid system of fundamental laws which are so well established that waves of doubt can't reach them; but it cannot be right at a time when the very foundations of physics itself have become problematic as they are now. At a time like the present, when experience forces us to seek a newer and more solid foundation, the physicist cannot simply surrender to the philosopher the critical contemplation of theoretical foundations; for he himself knows best and feels more surely where the shoe pinches. In looking for an new foundation, he must try to make clear in his own mind just how far the concepts which he uses are justified, and are necessities.

“There is little scientific data on the point, but evidently people do speak to themselves.”
David Crystal, "Refining stylistic discourse categories," In: G. Melchers & B. Warren (eds), English linguistics in honour of Magnus Ljung (Stockholm: Almqvist & Wiksell, 1994), 35-46

"The Artist of the Beautiful" (1844)