'Hidden' in the Bible

I know Ephraim, and Israel is not hidden from Me;For now, O Ephraim, you have played the harlot,Israel has defiled itself.

Shall I ransom them from the power of Sheol?Shall I redeem them from death?O Death, where are your thorns?O Sheol, where is your sting?Compassion will be hidden from My sight.