'Hidden' in the Bible

And though the Lord give you the bread of adversity and the water of affliction, yet shall not thy teachers be hidden anymore, but thine eyes shall see thy teachers;

and I will give thee the treasures of darkness, and hidden riches of secret places, that thou mayest know that it is I, Jehovah, who call thee by thy name, even the God of Israel.

Thou hast heard it; behold all this; and ye, will ye not declare it? I have showed thee new things from this time, even hidden things, which thou hast not known.