Just a mere description of the formal structure and style of the Book of Daniel clearly indicates that it has a special feature: constant and varying statements about God the Judge. The constantly recurring limited number of linguistic means clearly shows the intent of the text author: Refer the readers in the exile to the God hidden behind events, who arranges (not just influences) all that happens.
The Book about God the Judge teaches the readers to be sensitive to the hidden workings of God so that they can foresee or recognize them at the time they live and in their lives. It can thus be said that the purpose of the Book of Daniel in the Tanakh is to confront the readers with a certain type of faith confession and with certain manifestations of God and His method of work, thus giving a hint to them how to perceive, count on and respond to the workings of God.
The readers should learn how to get involved in the confession process, how to join the confession of faith with their confessions, which represent a relevant and expected response to the readers' perception and registration of God's control behind events. The readership thus learns by which means they can participate in the manifestations of God; in other words, they learn how to testify credibly and authentically about God the Judge (thus figuratively bringing Him to the stage) in a foreign (even hostile) environment.