“As for you, O king, your thoughts came into your mind on your bed, what should come about hereafter, and he who reveals secrets has made known to you what will come about. But as for me, this secret is not revealed to me for any wisdom that I have more than any living, but for the intent that the interpretation may be made known to the king, and that you may know the thoughts of your heart.”
The idea here is that while the king was lying in bed he had been thinking about the future, and what more great things lay before him. Had he also got in mind the erecting of the great image in chapter 3? The result was that God had given him the dream so that he would know exactly what was coming after.
Daniel is very concerned that Nebuchadnezzar should recognise that the God of heaven had deliberately made known to him what he was about to learn because of who he was, and how he had been thinking. The ‘revealer of secrets' has chosen to reveal them to him. It should come as a warning.
But at the same time he speaks humbly of himself. He is only a channel used by God in bringing about Nebuchadnezzar's understanding. He is really no different from others. The understanding was not given so as to magnify him. This was politically wise, but also evidence of the quality of the man. The focus must be on the message, and what it means for Nebuchadnezzar, rather than on the channel through which it comes.