The fear of ghosts in many human cultures is based on beliefs that some ghosts may be malevolent towards people and dangerous (within the range of all possible attitudes, including mischievous, benign, indifferent, etc.). It is related to fear of the dark.
The fear of ghosts is sometimes referred to as phasmophobia and erroneously spectrophobia, the latter being an established term for fear of mirrors and one's own reflections.
The fear of ghosts is widespread even in post-industrial societies. Philosopher Peter van Inwagen wrote:
"...I am perfectly aware that the fear of ghosts is contrary to science, reason and religion. If I were sentenced to spend a night alone in a graveyard, <...> I should already know that twigs would snap and the wind moan and that there would be half-seen movements in the darkness. And yet, after I had been frog-marched into the graveyard, I should feel a thrill of fear every time one of these things happened..."
In many traditional accounts, ghosts are often thought to be deceased people looking for vengeance, or imprisoned on earth for bad things they did during life. The appearance of a ghost has often been regarded as an omen or portent of death. Seeing one's own ghostly double or doppelgänger is a related omen of death.
Like a feeling that I'm down
Deep inside my heart
Like I'm looking out through
Splitting blood red
Windows in my heart
From a higher up than heaven
And a harder down than stone
Shake the fear that always clawing
Pulls me clawing down alone
As I spitting splitting blood red
Breaking windows in my heart
And the past is taunting
Fear of ghosts
Is forcing me apart
And the further I get
From the things that I care about
The less I care about
How much further away I get...
I am lost again
With everything gone
And more alone
Than I have ever been
I expect you to understand
To feel it too
But I know that even if you will
You cannot ever help me
Nor can I