Geometry as a Branch of Physics (1949)
“[O]nly in a homogeneous and isotropic space can the traditional concept of a rigid body be maintained.”
Geometry as a Branch of Physics (1949)
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Howard P. Robertson 28
American mathematician and physicist 1903–1961Related quotes

Kosmos (1932), Above is Beginning Quote of the Last Chapter: Relativity and Modern Theories of the Universe -->

“O body swayed to music, O brightening glance,
How can we know the dancer from the dance?”
Among School Children http://poetry.poetryx.com/poems/1437/, st. 8
The Tower (1928)
Context: Labour is blossoming or dancing where
The body is not bruised to pleasure soul.
Nor beauty born out of its own despair,
Nor blear-eyed wisdom out of midnight oil.
O chestnut-tree, great-rooted blossomer,
Are you the leaf, the blossom or the bole?
O body swayed to music, O brightening glance,
How can we know the dancer from the dance?

Page 437 https://books.google.com/books?id=-F8wAQAAMAAJ&pg=PA437. Quote republished in " Left and Right: The Prospects for Liberty http://alexpeak.com/twr/lar/1/1/2/," Left and Right: A Journal of Libertarian Thought 1, no. 1 (Spring, 1965), pp. <span class="plainlinks"> 21 http://alexpeak.com/twr/lar/1/1/2/#p21– 22 http://alexpeak.com/twr/lar/1/1/2/#p22</span>.
"Youth" (1912), II
Context: In this conflict between youth and its elders, youth is the incarnation of reason pitted against the rigidity of tradition. Youth puts the remorseless questions to everything that is old and established,—Why? What is this thing good for? And when it gets the mumbled, evasive answers of the elders, it applies its own fresh, clean spirit of reason to the institutions, customs, and ideas, and finding them stupid, inane, or poisonous, turns instinctively to overthrow them and build in their place the things with which its visions teem.

Quoted in "Ecofascism: Lessons from the German Experience" - Page 19 - by Janet Biehl, Peter Staudenmaier - 1995

“The concept of space is not abstracted from external sensations.”
Kant's Inaugural Dissertation (1770), Section III On The Principles Of The Form Of The Sensible World