Depersonalization

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 youre dreaming right now
And the world you live in doesnt even exist
What if Im not even speaking right now
It is actually all a dream
And all the people who listen to this song
Arent there to hear it