Since I am still in a reflective mood since Halloween/Samhain, I thought I’d blog this poem that was published some years back. I’ve heard it said that you can’t ‘keep’ a ghost, but to me that totally misunderstands the nature of the Otherworlds that surround us.
Ghosts
Sometimes when I turn my head,
You’re almost, almost there.
I catch a word, as yet unheard,
The essence of your prayer.
I sense my need to know you,
I feel you everywhere.
You’re waiting in the garden,
Or lingering in the hall,
I feel the breath of sparkling death,
Gathering like a pall.
I don’t know what you want from me,
But sense your anguished call.
I do not know the reason
That makes you stay so near,
Yet keep your post, sweet watchful ghost
There’s nothing you should fear.
But I wonder why you chose me,
And why you brought me here?
Munzly

Excellent poem.
This feeling that somebody is just behind you or beside you, almost in sight, but not quite, a sort of nearby presence, is a mental state that can be induced experimentally.
It's quite common, I get it myself occasionally. I realise that you don't want to know that, being of a mystical turn of mind, but personally, I find the technical explanations more exciting than the mystical ones.