Ideas from 'De arcanus motus' by Gottfried Leibniz [1676], by Theme Structure

[found in 'Leibniz Akademie Edition' by Leibniz,Gottfried (ed/tr [Berlin Akademie]) [Berline Akademie 1999,]].

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8. Modes of Existence / C. Powers and Dispositions / 1. Powers

12733

Because of the definitions of cause, effect and power, cause and effect have the same power

			Full Idea: The primary mechanical axiom is that the whole cause and the entire effect have the same power [potentia]. ..This depends on the definition of cause, effect and power.
			From: Gottfried Leibniz (De arcanus motus [1676], 203), quoted by Daniel Garber - Leibniz:Body,Substance,Monad 6
			A reaction: This is a useful reminder that if one is going to build a metaphysics on powers (which I intend to do), then the conservation laws in physics are highly relevant.

10. Modality / A. Necessity / 2. Nature of Necessity

12734

Every necessary proposition is demonstrable to someone who understands

			Full Idea: Every necessary proposition is demonstrable, at least by someone who understands it.
			From: Gottfried Leibniz (De arcanus motus [1676], 203), quoted by Daniel Garber - Leibniz:Body,Substance,Monad 6
			A reaction: This kind of optimism leads to the crisis of the Hilbert Programme in the 1930s. Gödel seems to have conclusively proved that Leibniz was wrong. What would Leibniz have made of Gödel?