I am glad to see these posts taking this topic in a serious way.

I have come to truly believe in good and evil. I believe that God gives us our senses for a reason. Often we use those senses to protect ourselves and our loved ones.
I have also met those with the "empty eyes". I describe them as "shark eyes". Cold with no emotion.
The last one I met was just before I retired. He was a serial killer that I had to interview just after he killed his last three victims.
It actually bothered me being there with him. Not that I was afraid he would hurt me, just that he was pure evil. I could feel it.

I agree about Gettysburg, two of my childhood friends and I have been there six times over the years are still planning another vacation there.
We agree that we are almost drawn there by something. It's more than the history.

I think that there is a lot that we don't yet understand about ourselves and the world around us.