'Middle' in the Bible

He dug it all around, removed its stones,And planted it with the choicest vine.And He built a tower in the middle of itAnd also hewed out a wine vat in it;Then He expected it to produce good grapes,But it produced only worthless ones.

On this account the anger of the Lord has burned against His people,And He has stretched out His hand against them and struck them down.And the mountains quaked, and their corpses lay like refuse in the middle of the streets.For all this His anger is not spent,But His hand is still stretched out.

And he will spread out his hands in the middle of itAs a swimmer spreads out his hands to swim,But the Lord will lay low his pride together with the trickery of his hands.

I said, “In the middle of my lifeI am to enter the gates of Sheol;I am to be deprived of the rest of my years.”