Depersonalization Lyrics

How can anyone really know that it all started with a big bang
And then the universe was born
What was there before the universe
Nothing? If there was nothing then was is nothingness
What if what you think is a dream is actually a reality
And what you think is reality is really a dream
Imagine if you're dreaming right now
And the world you live in doesn't even exist
What if I'm not even speaking right now
It is actually all a dream

And all the people who listen to this song
Aren't there to hear it