Daniel 12:4, 10

But as for you, Daniel, conceal these words and seal up the scroll until the end of time. Many will go back and forth and search anxiously [through the scroll], and knowledge [of the purpose of God as revealed by His prophets] will [greatly] increase.” [Amos 8:12]

Many will be purged, purified (made white) and refined, but the wicked will behave wickedly. None of the wicked shall understand, but those who are [spiritually] wise will understand. [Dan 11:33-35]