“Seen Yet Unseen: The Seven Spirits, The Son in the Old Testament, and Why Four Gospels?”

Question 1 — The Seven Spirits of God

Where can I find more information about the “seven spirits of God” mentioned in Revelation 4:5 and 5:6? I’ve heard the Book of Enoch may talk about this—does it? Is there more information elsewhere in the Bible, and is the Book of Enoch the best resource for understanding this?

Question 2 — Moses Seeing God / Christ in the Old Testament

If passages like 1 Timothy 6:16, John 1:18, John 6:46, and others say no one has ever seen God, but Exodus 33:11 says Moses spoke to the Lord “face to face,” does this mean Moses was speaking to Jesus in the Old Testament? If not, how do we reconcile these verses? And if Jesus says in John 5:46 that Moses wrote about Him, where else in the Old Testament can I look to find Jesus spoken of by Moses?

Question 3 — Four Gospel Accounts

If the Gospels are biographies of Jesus, why did God want us to have four different accounts instead of just one?