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29 And God said, Behold, I have given you every herb bearing seed, which is upon the face of all the earth, and every tree, in the which is the fruit of a tree yielding seed; to you it shall be for meat.
'To open,' as in Revelation 9, signifies communication and conjunction.
(References: Apocalypse Explained 537)
22 Moses stretched forth his hand toward the sky, and there was a thick darkness in all the land of Egypt three days.