'Known' in the Bible

Fear them not therefore; for there is nothing covered which shall not be revealed, and secret which shall not be known.

But if ye had known what is: I will have mercy and not sacrifice, ye would not have condemned the guiltless.

and charged them strictly that they should not make him publicly known:

Either make the tree good, and its fruit good; or make the tree corrupt, and its fruit corrupt. For from the fruit the tree is known.

But I say unto you that Elias has already come, and they have not known him, but have done unto him whatever they would. Thus also the Son of man is about to suffer from them.

But know this, that if the master of the house had known in what watch the thief was coming, he would have watched and not have suffered his house to be dug through into.