Agamemnon misunderstands the oracle of Apollo at Delphi, which had evidently prophesied to him that Troy would be captured when the ‘best of the Achaeans’—Odysseus and Achilles—engage in a quarrel at a feast. Agamemnon rejoices when he sees the two heroes quarreling, since he thinks that victory over the Trojans will be quick and easy—and painless. But the war will be a great pēma ‘pain’, O.08.081, for the Achaeans as also for the Trojans, O.08.082. This pain is compared to a breakaway boulder that ‘rolls’ down from the heights above, as expressed by way of kulindesthai, O.08.081, and this boulder will crush anyone that stands in its way. And all that pain will be caused by the Will of Zeus, O.08.082. For another comparable misunderstanding on the part of Agamemnon, see the comments on I.02.007–015 and on I.02.036–040.