Most of my life, I was certain that "ghosts" were just figments of our imagination, but as I grow older I realize that they are very real.
My Sister and her husband moved into a large older house with their 5 young kids, and from day one weird things started to happen.
First of all, it's a giant Victorian house on 4 big lots, and was priced about half of what it was worth.
Former owners moved out of state, and will not answer their phone.
There is a spirit there that does not like kids, he talks to them, scares them, but has never physically hurt any one.
Research shows a former tenant committed suicide in the house in the month of January, and my sister says January is when "it" is most active.
Another sister works at a retirement home, where it is quite common to see apparitions, people die there all the time.
My best guess is it's a dimension we haven't figured out yet.
After my Grandpa's death, I had a very vivid dream, in which he came to me...I asked what heaven was like...he said Heaven is all around you, and it's only one inch away. He was a carpenter, and a deeply religious man, when he held up his thumb and index finger, and said one inch away, i knew he meant exactly one inch. just a dream, i know, but so very real, and strange, 4th dimension?