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17 And God set them in the firmament of the heaven to give light upon the earth,
'To open,' as in Revelation 9, signifies communication and conjunction.
(References: Apocalypse Explained 537)
25 He shall speak words against the Most High, and shall wear out the saints of the Most High; and he shall think to change the times and the law; and they shall be given into his hand until a time and times and half a time.