Daniel is a book that promises hope for every generation. It tells of faithfulness in times of persecution, as the kingdoms of the earth turn away from God. It tells of the people of Israel waiting patiently for God to vindicate their suffering. The stories of Daniel, Hananiah, Azariah and Mishael tell of the struggles faced in going against the flow, but also tell of the faithfulness of God.
Suffering and death of the faithful are not seen as reasons to deny the faithfulness or power of God. In the words of the three men being threatened with the fiery furnace, our God is able to save us, but even if he does not that is not a reason to turn away from him.
While many academic discussions take place about the date in which this book was authored, and about the poor quality Hebrew compared to the good quality Aramaic in which it is written, the key messages are timeless and thus as relevant to us today as when they were first written.