'Concealed' in the Bible

"The kingdom of heaven is like treasure hidden in a field, that a man found [and] concealed, and in his joy he goes and sells everything that he has and buys that field.

But they did not understand this statement, and it was concealed from them so that they could not understand it. And they were afraid to ask him about this statement.

But nothing is concealed that will not be revealed, and secret that will not be made known.

And they understood none of these [things], and this saying was concealed from them, and they did not comprehend the things that were said.