Mysticism

Hello Mikhi, you say in lesson number 4 on mysticism that the world of ideas is mysticism because it claims something about the world, but it is not something that can be tested. But God cannot be tested either, and this is a claim about the world, but God can be reached with intuition and then logical deduction, like the cosmological argument, but the world of ideas also comes from a question of aspiration or when the Pythagorean triangle is true, so it is not a mystical thing because it is accessible to everyone. I would be happy if you could explain it to me. Thank you very much.