Golda Meir was having a nervous breakdown because she knew what was coming.
Her water carriers claim she didn't know it was imminent, at all. In a late interview she said she was scared of making a preemptive strike, but it was because of the possibility of not being effective at it, thus escalating a conflict which could have proved unsustainable. After the fact, Kissinger claimed Israel had been warned against any repeat of 1967, that the US wouldn't send one screw if it happened, but he also said it would be good if Israel were "bloodied".