20812
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Covers are for shields, and sheaths for swords; likewise, all in the cosmos is for some other thing [Chrysippus]
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Full Idea:
Just as the cover was made for the sake of the shield, and the sheath for the sword, in the same way everything else except the cosmos was made for the sake of other things.
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From:
Chrysippus (fragments/reports [c.240 BCE]), quoted by M. Tullius Cicero - On the Nature of the Gods ('De natura deorum') 2.37
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A reaction:
Chrysippus was wise to stop at the cosmos. Similarly, religious teleology had better not ask about the purpose of God. What does he think pebbles are for? Nature is the source of stoic value, so it needs to be purposeful.
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5975
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Stoics say earth, air, fire and water are the primary elements [Chrysippus, by Plutarch]
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Full Idea:
The Stoics call the four bodies - earth and water and air and fire - primary elements.
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From:
report of Chrysippus (fragments/reports [c.240 BCE], fr 444) by Plutarch - 72: Against Stoics on common Conceptions 1085c
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A reaction:
Elsewhere (fr 413) Chrysippus denies that they are all 'primary'. Essentially, though, he seems to be adopting the doctrine of Empedocles and Aristotle, in specific opposition to Epicurus' atomism.
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17549
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Seven theories in science: mechanics, heat, electricity, quantum, particles, relativity, life [Heisenberg, by PG]
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Full Idea:
Science has seven closed systems of concepts and axioms: Newtonian mechanics; the theory of heat; electricity and magnetism; quantum theory; the theory of elementary particles; general relativity; and the theory of organic life.
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From:
report of Werner Heisenberg (Physics and Philosophy [1958], 06) by PG - Db (ideas)
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A reaction:
[my summary of pp.86-88 and 92] It is interesting to have spelled out that there are number of 'closed' theories, which are only loosely connected to one another. New discoveries launch whole new theories, instead of being subsumed.
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