“Is it not reasonable to think that by far the greater part is solid and dark, and that this immense globe is encompassed with a thin covering of that resplendent substance from which the sun would seem to derive the whole of his vivifying heat and energy?”

Of the Sun; p. 64-5.
History of Astronomy During the Nineteenth Century (1885; 3rd ed 1893)

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Agnes Mary Clerke4

British astronomer 1842–1907

Jacques Ozanam (1640–1718) French mathematician

Jacques Ozanam, Recreations in mathematics and natural philosophy : Volume 3 van Recreations in Mathematics and Natural Philosophy. Published 1803. p. 140

“Suns are extinguished or become corrupted, planets perish and scatter across the wastes of the sky; other suns are kindled, new planets formed to make their revolutions or describe new orbits, and man, an infinitely minute part of a globe which itself is only an imperceptible point in the immense whole, believes that the universe is made for himself.”

Baron d'Holbach (1723–1789) French-German author, philosopher, encyclopedist

La Système de la nature; quoted by Norman Hampson, The Enlightenment p. 220 (paperback edition)

“The whole science of heat is founded Thermometry and Calorimetry, and when these operations are understood we may proceed to the third step, which is the investigation of those relations between the thermal and the mechanical properties of substances which form the subject of Thermodynamics. The whole of this part of the subject depends on the consideration of the Intrinsic Energy of a system of bodies, as depending on the temperature and physical state, as well as the form, motion, and relative position of these bodies. Of this energy, however, only a part is available for the purpose of producing mechanical work, and though the energy itself is indestructible, the available part is liable to diminution by the action of certain natural processes, such as conduction and radiation of heat, friction, and viscosity. These processes, by which energy is rendered unavailable as a source of work, are classed together under the name of the Dissipation of Energy.”

James Clerk Maxwell (1831–1879) Scottish physicist

Theory of Heat http://books.google.com/books?id=DqAAAAAAMAAJ "Preface" (1871)

“The fundamentalists seem haunted by the human body and neurotically debate which fractions of it should be covered, until they declare the whole thing, from head to toe, a gigantic private part.”

Ayaan Hirsi Ali (1969) Dutch feminist, author

Source: 2010s, Nomad: A Personal Journey Through the Clash of Civilizations (2010), Chapter 11, “School and Sexuality” (p. 154)

“The sun never shined on a cause of greater worth. 'Tis not the affair of a city, a country, a province, or a kingdom, but of a continent—of at least one eighth part of the habitable globe.”

Thomas Paine (1737–1809) English and American political activist

1770s, Common Sense (1776)
Context: The sun never shined on a cause of greater worth. 'Tis not the affair of a city, a country, a province, or a kingdom, but of a continent—of at least one eighth part of the habitable globe. 'Tis not the concern of a day, a year, or an age; posterity are virtually involved in the contest, and will be more or less affected, even to the end of time, by the proceedings now. Now is the seed time of continental union, faith and honor. The least fracture now will be like a name engraved with the point of a pin on the tender rind of a young oak; The wound will enlarge with the tree, and posterity read it in full grown characters.

“It comforts me to think that if we are created beings, the thing that created us would have to be greater than us, so much greater, in fact, that we would not be able to understand it. It would have to be greater than the facts of our reality, and so it would seem to us, look out from within our reality, that is would contradict reason. But reason itself would suggest it would have to be greater that reality, or it would not be reasonable.”

Donald Miller book Blue Like Jazz: nonreligious thoughts on Christian spirituality

Blue Like Jazz (2003, Nelson Books)

“Freedom had been hunted round the globe; reason was considered as rebellion; and the slavery of fear had made men afraid to think. But such is the irresistible nature of truth, that all it asks, — and all it wants, — is the liberty of appearing. The sun needs no inscription to distinguish him from darkness”

Thomas Paine book Rights of Man

Part 2.2 Introduction
1790s, Rights of Man, Part 2 (1792)
Context: Freedom had been hunted round the globe; reason was considered as rebellion; and the slavery of fear had made men afraid to think. But such is the irresistible nature of truth, that all it asks, — and all it wants, — is the liberty of appearing. The sun needs no inscription to distinguish him from darkness; and no sooner did the American governments display themselves to the world, than despotism felt a shock and man began to contemplate redress.