In my family - yes, that includes the extended family - it is fairly common to have encounters with "ghosts". It seems to run in a certain strain of the blood... There are Gardian Angels, demons, and souls who are suffering.
There was this one instance back when I was about 7 years old. We were praying for a woman who's husband pulled the plug on her, even though she was regaining consciousnes and her faculties. I remember as clear as day, the front door (and the screen door) of our house blew open and there was a sudden blast of very strong wind blowing through. I went to the door and closed it again very hard, and the strong wind was so memorable because we never get stuff like that except maybe in hurricane season. A moment later my older sister who had been taking a nap woke up crying saying the woman had come in through the front door to say thank you and goodbye. It's just not something you forget.
My parents also spoke about how certain family members would drop by after death to say goodbye, it's something you just feel and instinctively know is that person.
I also knew a girl who related a similar experience she had with a cousin with whom she was close to.
My father always tried to stay in the church until midnight for adoration on Holy Thursday. Those were interesting times, because we would be alone towards the end and yet, through the corner of my eyes I would seemingly see other people praying and kneeling in tge pews. But, if I looked there was nothing there. As long as one did not look directly at the supposed people you could "see" and feel them indirectly. I was told it's because there are always angels in adoration.
After my Grandpa died Grandma moved out, and the house was empty. It was about the time of All Souls Day maybe in 2014, we stopped at the house to check something (I guess) and eat lunch. As I brough the lunch box/ice box in from the truc I thought I saw someone sitting in one of the chaires grandpa always used in the living room. It was a black figuer, so presumed it was my brother, who was wearing a black coat that day. After setting the down the items I went to say something to what was thought to be my brother... but there was no one there. The scary part is that at that moment my brother came into the house from the back door. When I told my Dad and brother, my Dad said "You saw it too?" . That's when it became apparent it was real...
I feel sorry for people who have never had encounters with spirits amd profess to be non religious, atheists, etc.