When I was a child, I visited Amsterdam on a family trip. I had some kind of tummy bug so I spent most of the time being sick. From then on, Amsterdam was recorded in my brain like an undesirable destination.
Our life is made of likes and dislikes and we swing between them all the time. Sometimes the dislike is not the fault of the object – case in point, it was not Amsterdam’s fault if I was sick. It’s the association that created this illusion.
If I act automatically and unconsciously, I might think “if I go to Amsterdam I’ll be sick again” and avoid going there. But if I change my thinking and think “I just happened to be in Amsterdam when I was sick, so I can go there again”, maybe I’ll be able to spend a wonderful time there.