Dreams and Nightmares

Dreams and Nightmares
What's the difference, really?
Dreams make you live what is not
Nightmares make you relive what is

The unconscious mind
Its what causes this lie
That which binds us
To what we cannot find.

A Nightmare feeding
On what you are fearing
That has been living

A Dream collecting
On what you are loving
But is missing

A fearful feeling
A heart pounding
And sweat pouring

An ache created
On what you wished
But have missed

So I ask again
What is the difference in this bargain?
Because in my opinion

Dreams hurt you too