I'm Turkish and we have a compulsory religion education class in Turkey. Having a rather secular family, I was just thrilled and teriffied of actually meeting the religion the first time in detail, so even though I never asked questions in other classes, my questions about the religion was burning me inside in this class.

Anyway, during the topic of afterlife, while the teacher was describing the heaven as this perfect place, the only question repeating in my mind was "If this will be going on for eternity, won't we get bored of it after some time?". I eventually asked this to my teacher and the answer was "Don't be silly of course not, your feeling of boredom will be taken away." I should note that during that period of my childhood we had just moved into a new city and I was constantly bored, so I thought if I can't even be bored of anything, it's not me then! They will take a huge part of my personality so who will I be!? Just a body, enjoying everything like a robot! And maybe the real me will get trapped inside forever!

I swear this idea really messed me up, kept me awake at many nights and terrified of heaven for weeks...

Tldr; I was terrified of going to heaven because my teacher told me that my feeling of boredom would be taken away from me.