'Inside' in the Bible

Otherwise, I would speak without being terrified of him, because I'm not like that inside myself."

yet the food in his stomach turnsinto cobras’ venom inside him.

I'm boiling mad inside, and I won't remain silent; the time for my affliction to confront me has arrived.

Inside I am like wine which has no outlet, like new wineskins ready to burst!

"I'm pure. I'm without sin; I'm innocent. I'm harboring no iniquity inside of me.

Who can uncover its outer covering? Who can penetrate to the inside of its armor?