> It turns out, it’s much easier to focus on avoiding pain than it is to envision pleasure.

You just have a one-dimensional imagination. Don't want to shoot heroin up your veins forever, or have an infinite orgy? Just imagine playing paintball or walking on the beach, the cool sand running through your toes... or whatever. The mind is your oyster.

I'm sure if you were in Heaven, you wouldn't be worrying about making every moment the most exquisite you have ever experienced. It's not a competition; just chill out. You're in Heaven. Or day dreaming, same difference.