Apocalypse Explained # 317
317. And seven eyes, signifies and who has omniscience. This is evident from the signification of "seven eyes" as being, in reference to the Lord, omniscience; for as "eyes" in reference to man signify the understanding, so in reference to the Lord they signify omniscience. That "eyes" in reference to man signify the understanding, and in reference to the Lord providence, as also Divine wisdom and intelligence, which is omniscience, see above, n. 152. "Seven eyes" are mentioned, because "seven" signifies all things, and is predicated of what is holy (as above).
Arcana Coelestia # 6267
6267. 'And Joseph took them both, Ephraim in his right hand to Israel's left' means truth belonging to the understanding, to occupy the second place, 'and Manasseh in his left to Israel's right' means good belonging to the will, to occupy the first place. This is clear from the representation of 'Ephraim' as truth belonging to the understanding, and from the representation of 'Manasseh' as good belonging to the will, dealt with in 5354, 6222; and from the meaning of 'the right' as occupying the first place, and of 'the left' as occupying the second place, as is evident from what is the normal practice in life. The implications of all this will be discussed in what follows below.