The king answered unto Daniel - Answered either what he had said in the interpretation of the dream, or “possibly” something that he had said in regard to the impropriety of offering this homage to him. Compare the notes at Daniel 2:46. It is certain that, for some cause. whatever might have been the homage which he was disposed to render to Daniel, his thoughts were soon turned from him to the true God, and to an acknowledgment of him as superior to all other beings. He seems, at least, instantly to have reflected on what Daniel had himself said Daniel 2:30, and to have remembered that religious homage was due, not to Daniel, but to the God who had communicated the secret to him.
Of a truth it is - It is truly so. This had been shown by the manner in which this secret was disclosed.
That your God is a God of gods - Is superior to all other gods; is supreme over all. Compare Revelation 17:14; 1 Timothy 6:15. The idea is, that whatever subordinate beings there may be, He is supreme.
And a Lord of kings - Supreme over kings. They are all inferior to him, and subject to his control.
And a revealer of secrets - One of the attributes of divinity. See the notes at Daniel 2:28.
Seeing thou couldest reveal this secret - A secret which the wisest men of the realm had sought in vain to disclose. The fact that a professed servant of God had been able to do this showed that God was himself supreme, and worthy of adoration. We have here, then, an instance in which a proud and haughty pagan monarch was brought to an acknowledgment of the true God, and was constrained to render him homage. This was a result which it was evidently intended to reach in the whole transaction; in the dream itself; in the fact that the wise men of Babylon could not interpret it; and in the fact that an acknowledged servant of the Most High had been enabled to make the disclosure. The instance is instructive, as showing to what extent a mind clearly not under the influence of any genuine piety - for subsequent events showed that no “permanent” effects were produced on him, and that he was still an idolater Daniel 3, and a most proud and haughty man Daniel 4 - may be brought to acknowledge God. See the remarks at the end of the Daniel 7.