### „In any triangle the centre of gravity lies on the straight line joining any angle to the middle point of the opposite side.“

— Archimedes, buch On the Equilibrium of Planes

Book 1, Proposition 13.

On the Equilibrium of Planes

— Archimedes, buch On the Equilibrium of Planes

Book 1, Proposition 4.

On the Equilibrium of Planes

Übernommen aus Wikiquote. Letzte Aktualisierung 3. Juni 2021. Geschichte

— Archimedes, buch On the Equilibrium of Planes

Book 1, Proposition 13.

On the Equilibrium of Planes

— Archimedes, buch On the Equilibrium of Planes

Book 1, Proposition 9.

On the Equilibrium of Planes

— Archimedes, buch The Method of Mechanical Theorems

Proposition presumed from previous work.

The Method of Mechanical Theorems

— Archimedes, buch On the Equilibrium of Planes

Book 1, Proposition 10.

On the Equilibrium of Planes

— Archimedes, buch On the Equilibrium of Planes

Book 1, Proposition 14.

On the Equilibrium of Planes

— Archimedes, buch The Method of Mechanical Theorems

of the portion adjacent to the base

Proposition presumed from previous work.

The Method of Mechanical Theorems

— Arthur Schopenhauer, buch Parerga und Paralipomena

Vol. 2 "Further Psychological Observations" as translated in Essays and Aphorisms (1970), as translated by R. J. Hollingdale

Parerga and Paralipomena (1851), Counsels and Maxims

— Archimedes, buch The Method of Mechanical Theorems

Proposition 6.

The Method of Mechanical Theorems

— Letitia Elizabeth Landon English poet and novelist 1802 - 1838

Heath's book of Beauty, 1833 (1832)

— Rosa Luxemburg Polish Marxist theorist, socialist philosopher, and revolutionary 1871 - 1919

Peace Utopias (1911)

— Aristarchus of Samos ancient Greek astronomer and mathematician

p, 125

On the Sizes and Distances of the Sun and the Moon (c. 250 BC)

— Lee Smolin American cosmologist 1955

"Loop Quantum Gravity," The New Humanists: Science at the Edge (2003)

— Vitruvius, buch De architectura

Quelle: De architectura (The Ten Books On Architecture) (~ 15BC), Book VII, Chapter VIII, Sec. 3

— Mark Z. Danielewski, buch House of Leaves

Quelle: House of Leaves

— John Weiss United States clergyman and abolitionist 1818 - 1879

Wit, Humor, and Shakespeare: Twelve essays (1876), p. 63.

— Pierre Teilhard De Chardin French philosopher and Jesuit priest 1881 - 1955

This is how it has been understood by the great philosophers from Plato, the poet, to Nicolas of Cusa and other representatives of frigid scholasticism. Once this definition has been accepted, it gives rise to a series of important consequences. Love is power of producing inter-centric relationship. It is present, therefore (at least in a rudimentary state), in all the natural centres, living and pre-living, which make up the world; and it represents, too, the most profound, most direct, and most creative form of inter-action that it is possible to conceive between those centres. Love, in fact, is the expression and the agent of universal synthesis.

pp. 70–71 https://archive.org/stream/ActivationOfEnergy/Activation_of_Energy#page/n65/mode/2up

Activation of Energy (1976)

— Simone Weil French philosopher, Christian mystic, and social activist 1909 - 1943

— Leonardo Da Vinci Italian Renaissance polymath 1452 - 1519

The Notebooks of Leonardo da Vinci (1883), XV Astronomy

Kontext: The earth is not in the centre of the Sun's orbit nor at the centre of the universe, but in the centre of its companion elements, and united with them. And any one standing on the moon, when it and the sun are both beneath us, would see this our earth and the element of water upon it just as we see the moon, and the earth would light it as it lights us.

— Robert A. Heinlein, buch Farmer in the Sky

Quelle: Farmer in the Sky (1950), Chapter 17, “Disaster” (p. 177)