'Concealed' in the Bible

I have not hidden your righteousness within my heart. I have declared your faithfulness and your salvation. I have not concealed your loving kindness and your truth from the great assembly.

His malice may be concealed by deception, but his wickedness will be exposed in the assembly.

For my eyes are on all their ways; they are not hidden from my face, neither is their iniquity concealed from my eyes.

But they didn't understand this saying. It was concealed from them, that they should not perceive it, and they were afraid to ask him about this saying.