According to Osho, your extraordinary dream distilled the book’s whole message: the isness of reality—pure, immediate being—is inseparable from nothingness. The worded dream mirrors Bodhidharma’s non-imageable truth and the master–disciple testing of understanding ("Is?" "Yes." "What?" "Nothing."). It shows the teaching has touched your heart; now the task is to let this insight become your living, moment-to-moment reality.
It means your heart understood that everything simply is—and that this “is” is also nothing—and you’re being invited to live from that quiet awareness.