Astral entities archon spiders

How much do we know and understand about other dimensions? Even entities? What about people that get glimpses into different realities? Where do the ideas and thoughts come from? And, what information is sent to and from us, like transmitting receivers on all the different layers of reality? How long has the astral been around? Why aren't each of us taught about our spiritual gifts? And, how to protect ourself when we raise to higher frequencies and 'beingness'?