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14 And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:
'A sandal tree' signifies aspects of the natural self.
(References: Apocalypse Explained 518)
9 Then he said to me, Prophesy to the wind, prophesy, son of man, and tell the wind, Thus says the Lord Yahweh: Come from the four winds, breath, and breathe on these slain, that they may live.