you mean that the HS is given to all so all can interpret the Scriptures?
The Holy Spirit was poured out on all flesh. Joel 2:28-29. Notice what Jesus says when talking to the apostles about the Holy Spirit.
15 “If you love me, obey my commandments. 16 And I will ask the Father, and he will give you another Advocate, who will never leave you. 17 He is the Holy Spirit, who leads into all truth. The world cannot receive him, because it isn’t looking for him and doesn’t recognize him. But you know him, because he lives with you now and later will be in you. 18 No, I will not abandon you as orphans—I will come to you. 19 Soon the world will no longer see me, but you will see me. Since I live, you also will live. 20 When I am raised to life again, you will know that I am in my Father, and you are in me, and I am in you. 21
Those who accept my commandments and obey them are the ones who love me. And because they love me, my Father will love them. And I will love them and reveal myself to each of them.”
22 Judas (not Judas Iscariot, but the other disciple with that name) said to him, “
Lord, why are you going to reveal yourself only to us and not to the world at large?”
23 Jesus replied, “
All who love me will do what I say. My Father will love them, and we will come and make our home with each of them. 24 Anyone who doesn’t love me will not obey me. And remember, my words are not my own. What I am telling you is from the Father who sent me. 25 I am telling you these things now while I am still with you. 26
But when the Father sends the Advocate as my representative—that is, the Holy Spirit—he will teach you everything and will remind you of everything I have told you.
The Holy Spirit is given to all who love God. The Spirit lives within all of us if we love God. And His role is a Helper and to teach. I know you will say that the last part was Jesus just talking about the deciples since how could we be reminded of something if we weren’t there. However if that was the case then no one today could teach since no one was there. The Holy Spirit teaches us. Besides its not even hard to read the bible anyway. The key is to take it at face value. What is so hard to follow about the passage I gave you anyway. Maybe having bibles that weren’t in old English would be a lot easier to follow.
Also reciepiants of the epistles that Paul wrote for example could obviously understand what Paul was saying because otherwise Paul would not have written to them.
Again the Apostles used scripture to prove that Jesus was the Christ. If the people weren’t able to understand the scriptures then how could have they have used it to prove Jesus was the Christ? For example if a 10 year old does not believe Neptune exists, then proving it to him using advanced calculus that he will not understand is not going to help convince him. This is because calculus is meaningless to him because he can’t understand it. A picture of Neptune, which he can understand, will be much better in helping him believe.
Look at it this way. If you can’t understand what I’ve just said. Then you’re not going to believe that the scriptures are for all to understand. However if you do then you will at least be able to think about what I’ve said.