Do you ever feel as though there is someone with you? Close? Very close? As close as your shadow? You may be right!
I was reading online of some research done several years ago about the ‘many worlds theory’ on quantum physics. Essentially, there are a huge number of worlds (infinite or almost infinite) which coinhere with this universe of which we’re are part, and so there are multiples of you! Co-existing! Yes, there’s more than one of you – albeit, I’m guessing each ‘you’ in a parallel existence may be slightly different.
‘There are more things in heaven and earth, Horatio, Than are dreamt of in your philosophy.’ Shakespeare
Padre Pio, also known as Saint Pio of Pietrelcina, O.F.M. Cap., was a friar, priest, and mystic, and is now venerated as a saint of the Roman Catholic Church.The phenomenon of bilocation is one of the most remarkable gifts attributed to Padre Pio. His appearances on various of the continents are attested by numerous eye witnesses, who either saw him or smelled the odours characteristically associated with his presence, described by some as roses and by others as tobacco. Among the most remarkable of the documented cases of bilocation was the Padre’s appearance in the air over San Giovanni Rotondo during World War II. 
Peter, in the Bible, had been imprisoned, but a miracle had freed him, and he ran to the house of Mary, the mother of John. When he got there, he hammered on the door, and when Rhoda, inside, heard Peter’s voice she ran back to the others to tell them, leaving dear Peter still outside! Their reaction was understandable.
They said to her, “You are crazy!” But she insisted that it was so. They said, “It is his angel.” Acts 12:15
But, the interesting thing is that, depending on which version you read – they assumed it was his spirit or his angel! So, something connected to/with Peter, but separate! At least, that’s what they initially thought and what was on their mind – in their ‘theology’!
To ancient (Irish) Celts and Druids this being is the coimimeadh [pronounced koym-imah]. In the late 17th century, Reverend Robert Kirk wrote about the coimimeadh (literally the ‘co-traveller’) who is part of you (your soul), who walks beside you, generally, but sometimes can go walk-about (in which case you, too, can be bi-locational).
I am not I.
I am this one
walking beside me whom I do not see,
whom at times I manage to visit,
and whom at other times I forget;
who remains calm and silent while I talk,
and forgives, gently, when I hate,
who walks where I am not,
who will remain standing when I die.
By Juan Ramón Jiménez
Translated by Robert Bly
There are some common themes here, I think: We are not alone. We have a companion (or more than one) and some will call this doppelganger the ‘you’ in one or more of the ‘many worlds theory’ planes of existence, perhaps. Others might say your companion is your True Self or your Higher Self or glimpses of your spirit, others might say it’s a friendly elemental, or that it is your guardian angel(s), or, maybe even an energetic, personal, real-but-elusive, metaphor of…… [fill in the blank].
What do you think?