'Secrets' in the Bible

but there is a God in heaven who reveals secrets, and he has made known to the king Nebuchadnezzar what shall be in the latter days. Your dream, and the visions of your head on your bed, are these:

as for you, O king, your thoughts came [into your mind] on your bed, what should happen hereafter; and he who reveals secrets has made known to you what shall happen.

The king answered to Daniel, and said, Of a truth your God is the God of gods, and the Lord of kings, and a revealer of secrets, since you have been able to reveal this secret.