Apologia Pro Scriptis Meis.
Memoirs of My Dead Life http://www.gutenberg.org/dirs/etext05/8mmdl10.txt (1906)
“Do there exist many worlds, or is there but a single world? This is one of the most noble and exalted questions in the study of Nature.”
Attributed to Albertus Magnus in: R.C. Bless (1996) Discovering the cosmos. p. 686.
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Albertus Magnus 5
Dominican friar 1206–1280Related quotes
“When one tugs at a single thing in nature, he finds it attached to the rest of the world.”
These are paraphrases of Muir's quote from My First Summer in the Sierra (1911) - the actual quote is listed above: "When we try to pick out anything by itself, we find it hitched to everything else in the Universe." See Sierra Club explanation http://www.sierraclub.org/john_muir_exhibit/writings/misquotes.aspx.
Misattributed
Variant: Tug on anything at all and you'll find it connected to everything else in the universe.
Variant: When we tug at a single thing in nature, we find it attached to the rest of the world.
“One has to do good in order for it to exist in the world.”
Man muss das Gute tun, damit es in der Welt sei.
Source: Aphorisms (1880/1893), p. 24.
Philosophy : the basics (Fifth Edition, 2013), Introduction
Breaking Down the Wall of Silence (Abbruch der Schweigemauer) (1990)