Andrea, I think this passage holds a pretty good explanation.

"The world as it appears to us now is, as I said, largely a reflection of the egoic mind. Fear being an unavoidable consequence of egoic delusion, it is a world dominated by fear. Just as the images in a dream are symbolic expression of fear and of the heavy layers of negativity that have accumulated in the collective human psyche. We are not separate from our world, So when the majority of humans become free of egoic delusion, this inner change will affect all of creation. You will literally inhabit a new world. It is a shift in planetary consciousness. This strange Buddhist saying that every tree and every blade of grass will eventually become enlightened points to the same truth. According to St. Paul, the whole of creation is waiting for humans to become enlightened. That is how I interpret his saying that " The created universe is waiting with eager expectation for God’s sons to be revealed.& quot; St. Paul goes on to say that all of creation will become redeemed through this: " Up to the present… the whole created universe in all its parts groans as if in the pangs of childbirth.

What is being born is a new consciousness and, as its inevitable reflection, a new world. This is also foretold in the New Testament Book of Revelation: "Then I saw a new heaven and a new earth, for the first heaven and the first earth had passed away."

Eckhart Tolle