“Indeed, I am a safeguard to the inhabitants of earth as the stars are safeguards to the inhabitants of heaven.”

Introductory poem.
Poems (1869)
Context: This is a haunted world. It hath no breeze
But is the echo of some voice beloved:
Its pines have human tones; its billows wear
The color and the sparkle of dear eyes.
Its flowers are sweet with touch of tender hands
That once clasped ours. All things are beautiful
Because of something lovelier than themselves,
Which breathes within them, and will never die. —
Haunted,—but not with any spectral gloom;
Earth is suffused, inhabited by heaven.

Source: The Seth Material (1970), p. 312

World Within World (1951)
Context: I am for neither West nor East, but for myself considered as a self — one of the millions who inhabit the earth... If it seems absurd that an individual should set up as a judge between these vast powers, armed with their superhuman instruments of destruction I can reply that the very immensity of the means to destroy proves that judging and being judged does not lie in these forces. For supposing that they achieved their utmost and destroyed our civilization, whoever survived would judge them by a few statements. a few poems, a few témoignages [testimonies] surviving from all the ruins, a few words of those men who saw outside and beyond the means which were used and all the arguments which were marshaled in the service of those means.
Thus I could not escape from myself into some social situation of which my existence was a mere product, and my witnessing a willfully distorting instrument. I had to be myself, choose and not be chosen... But to believe that my individual freedom could gain strength from my seeking to identify myself with the "progressive" forces was different from believing that my life must be an instrument of means decided on by political leaders. I came to see that within the struggle for a juster world, there is a further struggle between the individual who cares for long-term values and those who are willing to use any and every means to gain immediate political ends — even good ends. Within even a good social cause, there is a duty to fight for the pre-eminence of individual conscience. The public is necessary, but the private must not be abolished by it; and the individual must not be swallowed up by the concept of the social man.

Inhale and Exhale (1936), Antranik and the Spirit of Armenia
Context: It's all over. We can begin to forget Armenia now. Andranik is dead. The nation is lost. I'm no Armenian. I'm an American. Well, the truth is I am both and neither. I love Armenia and I love America and I belong to both, but I am only this: an inhabitant of the earth, and so are you, whoever you are. I tried to forget Armenia but I couldn't do it.

Reported in Dictionary of Burning Words of Brilliant Writers (1895), edited bt Josiah Hotchkiss Gilbert, p. 284

Source: Aeneid (29–19 BC), Book V, Line 262; inscription on some British one-pound coins up until 2015. The line was suggested by John Evelyn for the edge legend on the new milled coinage of Charles II of England from 1662 on to discourage clipping. He had seen it on the edge of a mirror belonging to Cardinal Richelieu (recorded in his book Numismata in 1697). The suggestion was adopted.

trans. Jasper Hopkins (Minneapolis: Arthur J Banning Press, 1990), 119 – 20.
De Docta Ignorantia (On Learned Ignorance) (1440)

Almost-Classics: SF Concepts and Settings That Deserve Better Execution https://www.tor.com/2018/01/29/almost-classics-sf-concepts-and-settings-that-deserve-better-execution/ on Tor.com, January 29, 2018
2010s