“And then, the Earth being small, mankind will migrate into space, and will cross the airless Saharas which separate planet from planet and sun from sun. The Earth will become a Holy Land which will be visited by pilgrims from all the quarters of the Universe. Finally, men will master the forces of Nature; they will become themselves architects of systems, manufacturers of worlds.”

Letter to a Friend (circa 1656)

A Propos of Lady Chatterley's Lover (1929)
Context: Marriage is the clue to human life, but there is no marriage apart from the wheeling sun and the nodding earth, from the straying of the planets and the magnificance of the fixed stars. Is not a man different, utterly different, at dawn from what he is at sunset? And a woman too? And does not the changing harmony and discord of their variation make the secret music of life?

Source: Star Maker (1937), Chapter I: The Earth; 2. Earth Among the Stars (p. 15)

Anarchism: Its Philosophy and Ideal (1896)
Context: Take any work on astronomy of the last century, or the beginning of ours. You will no longer find in it, it goes without saying, our tiny planet placed in the center of the universe. But you will meet at every step the idea of a central luminary — the sun — which by its powerful attraction governs our planetary world. From this central body radiates a force guiding the course of the planets, and maintaining the harmony of the system. Issued from a central agglomeration, planets have, so to say, budded from it; they owe their birth to this agglomeration; they owe everything to the radiant star that represents it still: the rhythm of their movements, their orbits set at wisely regulated distances, the life that animates them and adorns their surfaces. And when any perturbation disturbs their course and makes them deviate from their orbits, the central body re-establishes order in the system; it assures and perpetuates its existence.
This conception, however, is also disappearing as the other one did. After having fixed all their attention on the sun and the large planets, astronomers are beginning to study now the infinitely small ones that people the universe. And they discover that the interplanetary and interstellar spaces are peopled and crossed in all imaginable directions by little swarms of matter, invisible, infinitely small when taken separately, but all-powerful in their numbers.

"The Old and the New Masters," lines 53-61
The Lost World (1965)

Philosophiae Naturalis Principia Mathematica (1687), Scholium Generale (1713; 1726)
Source: The Principia: Mathematical Principles of Natural Philosophy
Context: This most beautiful System of the Sun, Planets and Comets, could only proceed from the counsel and dominion of an intelligent and powerful being. And if the fixed Stars are the centers of other like systems, these being form'd by the like wise counsel, must be all subject to the dominion of One; especially, since the light of the fixed Stars is of the same nature with the light of the Sun, and from every system light passes into all the other systems. And lest the systems of the fixed Stars should, by their gravity, fall on each other mutually, he hath placed those Systems at immense distances one from another.

Diana Cyr, in "Live Young Forever: 12 Steps to Optimum Health, Fitness and Longevity", p. 10

Thus It Is, 1989, p. 6
As of a Trumpet, On Eagle's Wings, Thus It Is