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Full Idea
It is possible that there is no uniform motion by which time may have an exact measure. All motions can be accelerated and retarded, but the flow of absolute time cannot be changed.
Gist of Idea
If there is no uniform motion, we cannot exactly measure time
Source
Isaac Newton (Principia Mathematica [1687], Def 8 Schol)
Book Ref
Newton,Isaac: 'Philosophical Writings' [CUP 2004], p.66
Related Idea
Idea 17012 Time exists independently, and flows uniformly [Newton]
22963 | We measure change by time, and time by change, as they are interdefined [Aristotle] |
22968 | Circular motion is the most obvious measure of time, and especially the celestial sphere [Aristotle] |
17015 | If there is no uniform motion, we cannot exactly measure time [Newton] |
12487 | We can never show that two successive periods of time were equal [Locke] |
22882 | We use calendars for the order of events, and clocks for their passing [Bardon] |