Well reality may enter into the brain through the senses.
By throught ALL the senses, not only the classic 5 ones. I think there are 23 senses really. I'm not kidding...
Though, yes, all you get is electricity into your brain, similar to the computers way of receiving information.
And maybe our brains change due to all that electricity, call it experience or life. All the information we have get has changed our brains and making everyone see things in their way, with their own beliefs. But you can get a new information, and get a new feeling, so some electricity will go into your brain, and it will be changed.
Feelings change us. Or may I say the perception of our feelings (that's another sense).
Like "ok, it seems I was wrong in that belief, from now on, I'm gonna try to think X". And your SR changes... because your brain changes. Reality is just the same but every brain or consciousness thinks different about it according to beliefs created by our senses.
Don't take this too seriously.
