Christ consciousness (one son)
Higher Selves (realm of the sonship)
Spirits/souls (astral plane)
Physical (solid form)
Maybe I missed one or two.
Basically, the physical world IS NOT the only realm of the dream. There are higher levels of the dream also.
But also WITHIN the physical level, there are also levels. This is because there's a hierarchy of illusions. And also because there is time.
The levels within the physical realm are to do with where you are on your personal spiritual path/curriculum and what is the 'next' thing for you.
When you try to jump too far ahead of where you're at without genuinely completing the lessons needed, you 'bypass'. Typically this includes denial.
This also happens when a teacher, who is further along the path, comes along and exposes you to a light that is more inclusive than your current awareness.
They've appeared in your dream because you're ready to learn and they are ready to teach. But they might only show up for a short time, or a longer time, or a very long time depending on the relationship (see manual for teachers).
Sometimes you will be exposed to teachers who are way further along the path than you are. This will induce a lot of resistance, threat, unwillingness, guilt/inadequacy, and especially comparing yourself to them and finding yourself lacking.
So you need to be careful that you aren't trying to 'take on' too much before you are ready. So yes, this actually means, sometimes you will try to force yourself to be where a more advanced person is at, before you are ready, end up 'shoulding' yourself to bits, and this will only make you SUFFER.
So in this way, there are 'steps' or levels - sub-levels - within the level of the physical world. So when you try to skip a level/step and jump ahead too fast, you'll just get confused, frustrated and scared.
One step at a time. One foot in front of the next. If you try to skip ahead to future stepping stones, you'll slip and fall in the water.
As much as you are willing and ready to accept, given where you're at. And it's ok if you are slow. And it's okay if you do not get what the advanced teachers are expressing - they're not meant to be your teacher yet.
"Those who are to meet will meet". So let Holy Spirit decide what is the next right thing for you to learn and from whom. And you might also find that you begin to attract the right 'students' as well, who just appear out of nowhere because they're ready for what you're offering. You can help those who are a few steps behind you. But those who are far behind, maybe its okay to let them be taught by someone closer to where they are.
Gently does it.