Clocks are inherently four-dimensional instruments, since the endpoints of their unit distances are events. Measuring rods, on the other hand, are three-dimensional measuring instruments; their end points are space points and they can be changed into four-dimensional measuring instruments only if events are produced at their end points according to a special rule.
Hans ReichenbachRelated topics
end measuring rule space unit pointsRelated quotes
Mael, a scion of a royal family of Cambria, was sent in his ninth year to the Abbey of Yvern so that he might there study both sacred and profane learning. At the age of fourteen he renounced his patrimony and took a vow to serve the Lord. His time was divided, according to the rule, between the singing of hymns, the study of grammar, and the meditation of eternal truths.
Anatole France
As for what you say or hint of 'local' conditions: I knew of them. I don't think they have much changed (even for the worse). I used to hear them discussed by my mother; and have ever since taken a special interest in that part of the world. The treatment of colour nearly always horrifies anyone going out from Britain, & not only in South Africa. Unfort[unately], not many retain that generous sentiment for long.
J. R. R. Tolkien
SMITH & TINKER'S Patent Double-Action, Extra-Responsive, Thought-Creating, Perfect-Talking MECHANICAL MAN Fitted with our Special Clock-Work Attachment. Thinks, Speaks, Acts, and Does Everything but Live. Manufactured only at our Works at Evna, Land of Ev. All infringements will be promptly Prosecuted according to Law.
L. Frank Baum
Early human beings... filled a special ecological niche: they were carnivorous primates of the African plains. ...When agriculture permitted the increase of population density, game was no longer abundant... carnivorism remained a basic dietary impulse, with cultural aftereffects that varied according to the special conditions of the environment in which the society evolved.
E. O. Wilson
The prophet Isaiah ... points out what will be the cause of this change; for he says that hatred, quarrel, and fighting will come to an end, because men will have a true knowledge of God. "They shall not hurt nor destroy in all my holy mountain: for the earth shall be full of the knowledge of the Lord, as the waters which cover the sea" (Isa. xi. ver. 9) Note it.
Maimonides