Geometry as a Branch of Physics (1949)
“The centre and the radius of this auxiliary sphere are here quite arbitrary.”
"Gauss's Abstract of the Disquisitiones Generales circa Superficies Curvas presented to the Royal Society of Gottingen" (1827) Tr. James Caddall Morehead & Adam Miller Hiltebeitel in General Investigations of Curved Surfaces of 1827 and 1825 http://books.google.com/books?id=SYJsAAAAMAAJ& (1902)
Context: In researches in which an infinity of directions of straight lines in space is concerned, it is advantageous to represent these directions by means of those points upon a fixed sphere, which are the end points of the radii drawn parallel to the lines. The centre and the radius of this auxiliary sphere are here quite arbitrary. The radius may be taken equal to unity. This procedure agrees fundamentally with that which is constantly employed in astronomy, where all directions are referred to a fictitious celestial sphere of infinite radius. Spherical trigonometry and certain other theorems, to which the author has added a new one of frequent application, then serve for the solution of the problems which the comparison of the various directions involved can present.
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Carl Friedrich Gauss 50
German mathematician and physical scientist 1777–1855Related quotes
“When conventions are old, there's quite a good reason, it's not arbitrary.”
From a series of interviews with Marco Livingstone (April 22 - May 7, 1980 and July 6 - 7, 1980) quoted in Livingstone's David Hockney (1981) , p. 112
1980s
Context: When conventions are old, there's quite a good reason, it's not arbitrary. So Picasso discovered that, as it were, and I'm sure that for him that was probably almost as exciting as discovering Cubism, rediscovering conventions of ordinary appearance, one-point perspective or something. The purists think you're going backwards, but I know you'd go forward. Future art that is based on appearances won't look like the art that's gone before. Even revivals of a period are not the same. The Renaissance is not the same as ancient Greece; the Gothic revival is not the same as Gothic. It might look like that at first, but you can tell it's not. The way we see things is constantly changing. At the moment the way we see things has been left a lot to the camera. That shouldn't necessarily be.

p, 125
On the Sizes and Distances of the Sun and the Moon (c. 250 BC)

Letter 9 (August 25, 1837).
Letters on the Equality of the Sexes and the Condition of Woman (1837)

“Rest is not quitting
The busy career,
Rest is the fitting
Of self to one's sphere.”
Stanza 4.
Rest

Miscellaneous Works and Correspondence (1832), Demonstration of the Rules relating to the Apparent Motion of the Fixed Stars upon account of the Motion of Light.

p, 125
Space, Time and Gravitation (1920)

“Come the morning I’ll be far from here
Slowly rising in another sphere”
Home In The Sky
Song lyrics, Buddha and the Chocolate Box (1974)

Address on the Flag of India (22 July 1947), as recorded in the Constituent Assembly Of India Vol. IV http://parliamentofindia.nic.in/ls/debates/vol4p7.htm
Context: The Flag links up the past and the present. It is the legacy bequeathed to us by the architects of our liberty. Those who fought under this Flag are mainly responsible for the arrival of this great day of Independence for India. Pandit Jawaharlal has pointed out to you that it is not a day of joy unmixed with sorrow. The Congress fought for unity and liberty. The unity has been compromised; liberty too. I feel, has been compromised, unless we are able to face the tasks which now confront us with courage, strength and vision. What is essential to-day is to equip ourselves with new strength and with new character if these difficulties are to be overcome and if the country is to achieve the great ideal of unity and liberty which it fought for. Times are hard. Everywhere we are consumed by phantasies. Our minds are haunted by myths. The world is full of misunderstandings, suspicions and distrusts. In these difficult days it depends on us under what banner we fight.
Here we are Putting in the very centre the white, the white of the Sun's rays. The white means the path of light. There is darkness even at noon as some People have urged, but it is necessary for us to dissipate these clouds of darkness and control our conduct-by the ideal light, the light of truth, of transparent simplicity which is illustrated by the colour of white.
We cannot attain purity, we cannot gain our goal of truth, unless we walk in the path of virtue. The Asoka's wheel represents to us the wheel of the Law, the wheel Dharma. Truth can be gained only by the pursuit of the path of Dharma, by the practice of virtue. Truth,—Satya, Dharma —Virtue, these ought to be the controlling principles of all those who work under this Flag. It also tells us that the Dharma is something which is perpetually moving. If this country has suffered in the recent past, it is due to our resistance to change. There are ever so many challenges hurled at us and if we have not got the courage and the strength to move along with the times, we will be left behind. There are ever so many institutions which are worked into our social fabric like caste and untouchability. Unless these things are scrapped we cannot say that we either seek truth or practise virtue. This wheel which is a rotating thing, which is a perpetually revolving thing, indicates to us that there is death in stagnation. There is life in movement. Our Dharma is Sanatana, eternal, not in the sense that it is a fixed deposit but in the sense that it is perpetually changing. Its uninterrupted continuity is its Sanatana character. So even with regard to our social conditions it is essential for us to move forward.
The red, the orange, the Bhagwa colour, represents the spirit of renunciation. All forms of renunciation are to be embodied in Raja Dharma. Philosophers must be kings. Our leaders must be disinterested. They must be dedicated spirits. They must be people who are imbued with the spirit of renunciation which that saffron, colour has transmitted to us from the beginning of our history. That stands for the fact that the World belongs not to the wealthy, not to the prosperous but to the meek and the humble, the dedicated and the detached.
That spirit of detachment that spirit of renunciation is represented by the orange or the saffron colour and Mahatma Gandhi has embodied it for us in his life and the Congress has worked under his guidance and with his message. If we are not imbued with that spirit of renunciation in than difficult days, we will again go under.
The green is there, our relation to the soil, our relation to the plant life here, on which all other life depends. We must build our Paradise, here on this green earth. If we are to succeed in this enterprise, we must be guided by truth (white), practise virtue (wheel), adopt the method of self-control and renunciation (saffron). This flag tells us "Be ever alert, be ever on the move, go forward, work for a free, flexible, compassionate, decent, democratic society in which Christians, Sikhs, Muslims, Hindus, Buddhists will all find a safe shelter." Let us all unite under this banner and rededicate ourselves to the ideas our flag symbolizes.

Source: Locksley Hall Sixty Years After (1886), Line 198