You've learned a lot of things in your life, and there's a good chance that some of the concepts in this experience are things you've heard before. Your mind's natural inclination is to disregard things that are already familiar in order to not divert its attention from things that are new and unknown. This is an absolute necessity in order to not become overwhelmed by the world around you.
But please be vigilant of this, because just because you've heard something before doesn't mean that you've seen its full potential. In order to get the most out of this experience, you need to listen and not throw anything aside just because it's familiar to you. And remember that even if you fully agree with a concept, that knowledge alone will not yield any results until it leads to action or change.
But there's also a chance that you just simply disagree with something that is said. You may then find yourself in a position where you'll either have to accept that there's a possibility that you may have been wrong about something and try out the concept with an open mind. Or you can challenge the concept, resist it, or perhaps just simply ignore it.
Don't get me wrong, I think it's good to question things. But it's also important to not just question everything around you but sometimes also turn that critical attention inwards. There's a natural inclination to stick to what you already believe in and downplay or even ridicule contrary views. It's not surprising at all, since very few people enjoy being wrong. Most people strive for at least some level of stability, order and comfort in their lives - and having your beliefs put in question is thereby something most people tend to avoid or at least feel uncomfortable about.
If you notice this happening during the experience, you can always put the experience on pause and think things through. Why did you get that reaction? I'm not asking you to accept anything that is said without question, but I would like you to at least consider the concepts with an open mind. Just because you have never felt or experienced something, it doesn't mean that you can never feel or experience it - which, if you've read this guide thoroughly - is a concept you may have heard before.