*Daniel 12:4 KJV*
But thou, O Daniel, shut up the words, and seal the book, even to the time of the end: many shall run to and fro, and knowledge shall be increased.
This verse is saying many shall run to and fro within the Book of Daniel an knowledge on the book of Daniel would be increased. At the start of the verse it is sealed till the time of the end, so only in the time of the end would people understand more about what Daniel was shown.