“We wish to find the truth, no matter where it lies. But to find the truth we need imagination and skepticism both. We will not be afraid to speculate, but we will be careful to distinguish speculation from fact.”

—  Carl Sagan

Last update June 3, 2021. History

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Carl Sagan 365
American astrophysicist, cosmologist, author and science ed… 1934–1996

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“We wish to pursue the truth no matter where it leads — but to find the truth, we need imagination and skepticism both.”

Carl Sagan (1934–1996) American astrophysicist, cosmologist, author and science educator

5 min 15 sec
Cosmos: A Personal Voyage (1990 Update), The Shores of the Cosmic Ocean [Episode 1]
Context: We wish to pursue the truth no matter where it leads — but to find the truth, we need imagination and skepticism both. We will not be afraid to speculate, but we will be careful to distinguish speculation from fact. The cosmos is full beyond measure of elegant truths; of exquisite interrelationships; of the awesome machinery of nature. The surface of the Earth is the shore of the cosmic ocean. On this shore we've learned most of what we know. Recently we've waded a little way out, maybe ankle deep, and the water seems inviting. Some part of our being knows this is where we came from. We long to return. And we can. Because the cosmos is also within us. We're made of star-stuff. We are a way for the cosmos to know itself.

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“When we believe that science or religion "has the truth," we stop our speculations. While still referring to the theory of evolution, science accepts it as a fact, about existence, and therefore any speculation that threatens that theory becomes almost heretical.”

Jane Roberts (1929–1984) American Writer

Source: The God of Jane: A Psychic Manifesto (1981), p. 58
Context: When we believe that science or religion "has the truth," we stop our speculations. While still referring to the theory of evolution, science accepts it as a fact, about existence, and therefore any speculation that threatens that theory becomes almost heretical. So often it seems that there is no other choice in the matter of man's origin than a meaningless universe and an earth populated by creatures who fight for survival, or a universe created by Christianity's objectified God. And to me, at least, the Eastern religions present no acceptable answers, either.

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“In practical life we are compelled to follow what is most probable ; in speculative thought we are compelled to follow truth.”

Baruch Spinoza (1632–1677) Dutch philosopher

Letter 56 (60), to Hugo Boxel (1674) http://oll.libertyfund.org/?option=com_staticxt&staticfile=show.php%3Ftitle=1711&chapter=144218&layout=html&Itemid=27
Source: The Letters
Context: When you say that if I deny, that the operations of seeing, hearing, attending, wishing, &c., can be ascribed to God, or that they exist in him in any eminent fashion, you do not know what sort of God mine is; I suspect that you believe there is no greater perfection than such as can be explained by the aforesaid attributes. I am not astonished; for I believe that, if a triangle could speak, it would say, in like manner, that God is eminently triangular, while a circle would say that the divine nature is eminently circular. Thus each would ascribe to God its own attributes, would assume itself to be like God, and look on everything else as ill-shaped.
The briefness of a letter and want of time do not allow me to enter into my opinion on the divine nature, or the questions you have propounded. Besides, suggesting difficulties is not the same as producing reasons. That we do many things in the world from conjecture is true, but that our redactions are based on conjecture is false. In practical life we are compelled to follow what is most probable; in speculative thought we are compelled to follow truth. A man would perish of hunger and thirst, if he refused to eat or drink, till he had obtained positive proof that food and drink would be good for him. But in philosophic reflection this is not so. On the contrary, we must take care not to admit as true anything, which is only probable. For when one falsity has been let in, infinite others follow.
Again, we cannot infer that because sciences of things divine and human are full of controversies and quarrels, therefore their whole subject-matter is uncertain; for there have been many persons so enamoured of contradiction, as to turn into ridicule geometrical axioms.

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“We need not hide anything from Truth, for it never condemns us, but only wishes to help.”

Vernon Howard (1918–1992) American writer

1500 Ways to Escape the Human Jungle

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“Maybe we should gather a few more facts before wasting our time speculating.”

Source: Ring (1994), Chapter 30 (p. 852)

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