You may know someone who can see and hear what others can't, but would that person tell you? I know some who I believe might be, but many of them are not about to reveal such a secret. Others have faced ridicule, shunning and worse, and as a result many have tried their best to "tune it out" of their lives. I certainly recall when I was reading about one visionary that it occurred to me that he was lucky that he did not have my third-grade teacher. She would have accused him of "day-dreaming".
If you've been through that, here's some news: You can open the door now!
And let's see how you might do that.