12.3 “a sphere rejoicing.. .”: Empedocles frg. B 27 (also quoted at 8.41).
12.11a What it’s made of: Part of 12 in the manuscripts; placed in 11 by Meric
Casaubon. Perhaps an incomplete entry, perhaps an addition by a later
hand.
12.17 Let your intention be <... >: The division between Chapters 17 and 18 is
unclear, and it seems likely that some text has been lost.
12.27 Fabius Catullinus et al.: Most of the references are obscure; see the
Index of Persons for what can be guessed of them.
12.34 people whose only morality... : The Epicureans.