Luke 21:26b-27, 33
The powers of the heavens will be shaken. And then they will see the Son of Man coming in a cloud with power and great glory. … Heaven and earth will pass away, but my words will not pass away.

We look around us and it seems as if this world is solid, permanent, unshakable. But it will be shaken. It will pass away. Jesus will return. He has said it. His Word is more solid than the world. For the world was created by His Word.