These verses describe most accurately how Agamemnon, dreaming his False Dream, misunderstands the Will of Zeus. As we read at I.02.036 here, Agamemnon is thinking things that will definitely not ‘come to fulfillment’, teleîsthai, through the will of the god. As we read further at I.02.037, Agamemnon thinks that he will now capture Troy in just one day, in accordance with the Will of Zeus. Of course he is wrong to think this, as we read still further at I.02.038–040, since Zeus is now planning to inflict many more algea ‘pains’ in battle not only for the Trojans but also, more pertinently, for the Achaeans. The Trojan War is about to be prolonged for the Achaeans, causing them much more hardship and pain.
* Here and elsewhere, I cite verbs via the infinitive, not via the indicative first person singular.