Something revealed or disclosed, esp. a striking disclosure, as of something not before realized.

What book of the bible is that?
If you said Revelation, congratulations! This book of the Bible is all about God revealing Himself  and His kingdom as He never has before.
The title sums up the whole book.

Revelation 1:1-3
The Revelation of Jesus Christ, which God gave Him to show His servants—things which must shortly take place. And He sent and signified it by His angel to His servant John,  who bore witness to the word of God, and to the testimony of Jesus Christ, to all things that he saw.  Blessed is he who reads and those who hear the words of this prophecy, and keep those things which are written in it; for the time is near.

The time is near. That says allot! It is pretty scary actually. But it is also glorious, think of God coming down to earth in all his splendor! It is a scary wonderful thought.