'Itself' in the Bible

Most certainly I tell you, unless a grain of wheat falls into the earth and dies, it remains by itself alone. But if it dies, it bears much fruit.

Remain in me, and I in you. As the branch can't bear fruit by itself, unless it remains in the vine, so neither can you, unless you remain in me.

and the cloth that had been on his head, not lying with the linen cloths, but rolled up in a place by itself.

There are also many other things which Jesus did, which if they would all be written, I suppose that even the world itself wouldn't have room for the books that would be written.