My outlook towards ghosts is very deeply rooted in Christian beliefs. Which is funny because most Christians cannot explain the supernatural - and will avoid it like the plague. Especially now, it is very important to understand each individual aspect of the things that go bump in the night, so that, at the very least, you understand what they are, if you ever see them.

Ghosts are disembodied spirits. When you kill a Nephilim/Giant, you absolutely must ensure the head is cut off. But I digress. That life essence which was part of the identity of that giants and/or angel descendants becomes a disembodied spirit which seeks to push people off their intended paths or cause damage the only way it can - through apparitions, energy things like causing inanimate objects to move etc. Things that go bump in the night. Invoking the power of Jesus Christ causes them to leave immediately. They may or may not return.

I have very rarely had supernatural encounters in my life. Once I saw the Oklahoma "Spook Light," out by Miami, Ok - where I lived for 2 years in my early 20's. This is what pushed me to begin to pay attention to the supernatural and begin to study it from a Biblical perspective - usually.