In my own experience, I have encountered a grey-type being who demanded of me, "What are you doing here? We're not ready for you yet."

I suspect that many people have encountered this same comment, relative to world events or even encounters with beings who are clearly not from Earth.

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"We're not ready yet."

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So, as a rhetorical question, I will simply state: Is it possible that unbeknownst to all these different groups and individuals, they are all working on the same time schedule? As to what they are waiting for, I cannot imagine. Who has set the master schedule? I'm not going to even attempt to make a guess at that! (Postings here at P&M definitely have named a range of possibilities.)