Prophecy in general provides evidence that the Bible is true, and that God exists, for that matter. Perhaps this fact is more clearly evident in the book of Daniel.
For one thing, the book is anchored in known history. Evidence for the rule of specific Babylonian kings, kings of the Media-Persian empire, even Jewish kings, exists outside the Bible. No one can say Daniel is dealing with pretend individuals in a pretend place.
In addition, Daniel gave much of his prophecy to pagan kings—Nebuchadnezzar, Belshazzar, Darius, Cyrus—who started out worshiping their own gods. Because Daniel’s prophecies came true, he gained their favor and was promoted as a key figure in the various governments.
History records the outcome of some of his prophecies, the Bible records others, but in each case they happened as Daniel said they would.
Take one of Nebuchadnezzar’s dreams, for example. What he saw was prophetic, but he needed Daniel to interpret it. In short, the dream prophesied that the Babylonian empire would give way to the empire of the Medes and the Persians. That empire would give way to the Greek rule, and the Romans would take over from them, though that empire would fracture into four not-so-powerful regions. No surprise that these things took place, except that Daniel’s prophecy foretold them accurately.
On a personal note, Daniel interpreted another of King Nebuchadnezzar’s dreams:
‘My lord, if only the dream applied to those who hate you and its interpretation to your adversaries! The tree that you saw, which became large and grew strong, whose height reached to the sky and was visible to all the earth and whose foliage was beautiful and its fruit abundant, and in which was food for all, under which the beasts of the field dwelt and in whose branches the birds of the sky lodged—–it is you, O king; for you have become great and grown strong, and your majesty has become great and reached to the sky and your dominion to the end of the earth. In that the king saw an angelic watcher, a holy one, descending from heaven and saying, “Chop down the tree and destroy it; yet leave the stump with its roots in the ground, but with a band of iron and bronze around it in the new grass of the field, and let him be drenched with the dew of heaven, and let him share with the beasts of the field until seven periods of time pass over him,” this is the interpretation, O king, and this is the decree of the Most High, which has come upon my lord the king’ (from Daniel 4)
A year later, just as Daniel prophesied, Nebuchadnezzar had a psychotic break that left him behaving like an animal. But he recovered, and he reported himself that God brought him from the brink of madness:
“At that time my reason returned to me. And my majesty and splendor were restored to me for the glory of my kingdom, and my counselors and my nobles began seeking me out; so I was reestablished in my sovereignty, and surpassing greatness was added to me. Now I, Nebuchadnezzar, praise, exalt and honor the King of heaven, for all His works are true and His ways just, and He is able to humble those who walk in pride.” (Ibid.)
Another personal prophecy Daniel delivered was to King Belshazzar. In this instance he interpreted a supernatural writing on the wall which declared the end of this particular king’s rule. The result?
That same night Belshazzar the Chaldean king was slain. So Darius the Mede received the kingdom at about the age of sixty-two. (see Daniel 5)
More evidence of the truth of these prophecies, on top of their fulfillment, is the fact that the different kings listened to Daniel, believed him, promoted him, and rewarded him. If what he said was not verified, these kings would no more have kept Daniel around than American Presidents keep their cabinet members around.
In addition, Daniel incurred the wrath of other key people in King Darius’s administration, so much so that they manipulated the king into creating a law directed at Daniel. They wanted to accuse him of wrong doing, but they couldn’t find any corruption in anything he’d done. They resorted to the only thing they knew they could catch him doing: praying.
God, after all, was Daniel’s source of knowledge, as he repeatedly said. He couldn’t interpret dreams or prophecy. But God could reveal what He willed through Daniel.
The only argument against this evidence of fulfilled prophecy that I’m aware of is the alteration of the date of writing for the book.
Internal evidence clearly marks all these prophecies as occurring during the 70 years of Jewish exile, before any of the political events took place. But those who do not believe that prophecy can and does exist, immediately give a late date to the book of Daniel, reasoning that the events must have happened before some writer inscribed them.
It’s an old trick: dismiss evidence because of the supernatural elements, then claim no evidence for the supernatural exists.
The truth is, the prophecies of Daniel bear witness to the fact that God who is sovereign over the affairs of men, has revealed Himself, His work, His plan, His purpose within the pages of the Bible.