'Secret' in the Bible

And if ye will not hear it, my soul shall weep in secret places for your pride; and mine eye shall weep sore, and run down with tears, because Jehovah's flock is gone into captivity.

Can any hide himself in secret places, that I shall not see him? saith Jehovah. Do not I fill the heavens and the earth? saith Jehovah.

But I have made Esau bare, I have uncovered his secret places, that he is unable to hide himself: his seed is wasted, and his brethren, and his neighbours, and he is not.