This is a dream.
Look around you.
Study your self.
In time, you may come to see what I mean by
“This is a dream”:

What was it like before you were born?
I suppose it was like just before falling asleep.
What will it be like after you die?
I suppose it may be somewhat like just after waking up.
Then, metaphysically, you'll do things, and then, ultimately
go back to sleep.
When you do, you'll probably start “dreaming” again.