Quotes from book
The Mysterious Universe

The Mysterious Universe
James Jeans

The Mysterious Universe is a popular science book by the British astrophysicist Sir James Jeans, first published in 1930 by the Cambridge University Press. In the United States, it was published by Macmillan.

James Jeans photo

“Everything that has been said, and every conclusion that has been tentatively put forward, is quite frankly speculative and uncertain. We have tried to discuss whether present-day science has anything to say on certain difficult questions, which are perhaps set for ever beyond the reach of human understanding. We cannot claim to have discerned more than a very faint glimmer of light at the best; perhaps it was wholly illusory, for certainly we had to strain our eyes very hard to see anything at all. So that our main contention can hardly be that the science of to-day has a pronouncement to make, perhaps it ought rather to be that science should leave off making pronouncements: the river of knowledge has too often turned back on itself.”

James Jeans book The Mysterious Universe

The closing sentences of the book, on p. 188 of Pelican Books 1938 reprint of 1931 2nd ed.
The Mysterious Universe (1930)

James Jeans photo

“From the intrinsic evidence of his creation, the Great Architect of the Universe now begins to appear as a pure mathematician.”

James Jeans book The Mysterious Universe

Source: The Mysterious Universe (1930), p. 134, 1930 ed.

James Jeans photo

“For, for aught we know, or for aught that the new science can say to the contrary, the gods which play the part of fate to the atoms of our brains may be our own minds. Through these atoms our minds may perchance affect the motions of our bodies and so the state of the world around us. To-day science can no longer shut the door on this possibility; she has no longer any unanswerable arguments to bring against our innate conviction of free-will. On the other hand, she gives no hint as to what absence of determinism or causation may mean. If we, and nature in general, do not respond in a unique way to external stimuli, what determines the course of events? If anything at all, we are thrown back on determinism and causation; if nothing at all, how can anything ever occur? As I see it, we are unlikely to reach any definite conclusions on these questions until we have a better understanding of the true nature of time.”

James Jeans book The Mysterious Universe

Source: The Mysterious Universe (1930), p. 29-30 of 1930 ed.

James Jeans photo

“The tendency of modern physics is to resolve the whole material universe into waves, and nothing but waves. These waves are of two kinds: bottled-up waves, which we call matter, and unbottled waves, which we call radiation or light. If annihilation of matter occurs, the process is merely that of unbottling imprisoned wave-energy and setting it free to travel through space. These concepts reduce the whole universe to a world of light, potential or existent, so that the whole story of its creation can be told with perfect accuracy and completeness in the six words: ‘God said, Let there be light’.”

James Jeans book The Mysterious Universe

The Mysterious Universe (1930)

James Jeans photo

“The final truth about a phenomenon resides in the mathematical description of it; so long as there is no imperfection in this, our knowledge of the phenomenon is complete. We go beyond the mathematical formula at our own risk; we may find a model or a picture which helps us understand it, but we have no right to expect this, and our failure to find such a model or picture need not indicate that either our reasoning or our knowledge is at fault. The making of models or pictures to explain mathematical formulas and the phenomena they describe is not a step towards, but a step away from reality; it is like making a graven image of a spirit.”

James Jeans book The Mysterious Universe

The Mysterious Universe (1930)

James Jeans photo

“And the substance out of which this bubble is blown, the soap-film, is empty space welded onto empty time.”

James Jeans book The Mysterious Universe

Source: The Mysterious Universe (1930), p. 100, 1937 ed.

James Jeans photo

“The concepts which now prove to be fundamental to our understanding of nature—a space which is finite; a space which is empty, so that one point [of our 'material' world] differs from another solely in the properties of space itself; four-dimensional, seven- and more dimensional spaces; a space which for ever expands; a sequence of events which follows the laws of probability instead of the law of causation—or alternatively, a sequence of events which can only be fully and consistently described by going outside of space and time—all these concepts seem to my mind to be structures of pure thought, incapable of realisation in any sense which would properly be described as material.”

James Jeans book The Mysterious Universe

Source: The Mysterious Universe (1930), p. 122, 1937 ed.

James Jeans photo

“Life exists in the universe only because the carbon atom possesses certain exceptional properties.”

James Jeans book The Mysterious Universe

Source: The Mysterious Universe (1930), p. 19, Pelican Books 1938 reprint of 1931 2nd ed.

James Jeans photo

“Today there is a wide measure of agreement, which on the physical side of science approaches almost to unanimity, that the stream of knowledge is heading towards a non-mechanical reality; the universe begins to look more like a great thought than like a great machine. Mind no longer appears as an accidental intruder into the realm of matter; we are beginning to suspect that we ought rather to hail it as a creator and governor of the realm of matter…”

James Jeans book The Mysterious Universe

Source: The Mysterious Universe (1930), p. 137, 1937 ed.

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