'Mystery' in the Bible

"Can you fathom the mystery of God? Or can you probe the limits of the Almighty?

“But notice, the prosperity of the wicked is not in their hand (in their power);The counsel of the wicked [and the mystery of God’s dealings with the ungodly] is far from my comprehension.

My frame was not hidden from You,When I was being formed in secret,And intricately and skillfully formed [as if embroidered with many colors] in the depths of the earth.

urging them to ask the God of heaven for mercy concerning this mystery, so Daniel and his friends would not be killed with the rest of Babylon’s wise men.

The mystery was then revealed to Daniel in a vision at night, and Daniel praised the God of heaven

I offer thanks and praise to You,God of my fathers,because You have given mewisdom and power.And now You have let me knowwhat we asked of You,for You have let us knowthe king’s mystery.

Daniel answered the king: “No wise man, medium, diviner-priest, or astrologer is able to make known to the king the mystery he asked about.

As for me, this mystery has been revealed to me, not because I have more wisdom than anyone living, but in order that the interpretation might be made known to the king, and that you may understand the thoughts of your mind.

The king said to Daniel, “Your God is indeed God of gods, Lord of kings, and a revealer of mysteries, since you were able to reveal this mystery.”

“Belteshazzar, head of the diviners, because I know that you have a spirit of the holy gods and that no mystery puzzles you, explain to me the visions of my dream that I saw, and its interpretation.