I'd like to create (with your aid) a list of all known spiritual teachers who have lived and who are still alive. The individual styles of each teacher may not resonate with everybody, so the more teaching styles we can gather, the better. 
This list has no particular order and is not supposed to evaluate or rank the teacher.
Just write down whatever name comes to your mind, but please make sure not to repeat the name of a teacher.
 
 
 

365 lessons and excercises:
https://acimi.com/a-course-in-miracles/workbook/lesson-1

Awakening is ego death- and coming back.  So when someone says you ain't awake - it means you ain't died.   It's Absolute and finally.  There are no degrees.  God is God and omniscience is Absolute.   There are no degrees to omniscience.   You can understand reality In a flash but you can forget it even quicker.  The fool believes there are degrees to grasping God.  There cannot be because God is beyond the human grasp.   There is only becoming God.  But enlightenment is very real, even if we are only left with the memory.   God becomes God for a short time - the rest of his time is spent being that which is other than God.  It's much more spellbinding.  To God, being God is boring.  It is much more enticing to be mortal.  

If you observe what is happening without labeling it, you'll see that it's is just a big spontaneous happening, which is exactly like imagination: spontaneous creativity without any true origin. From this perspective, it sounds more valid to say that everything is imaginary, because there is no true "ground" from which things are arising out from. But this is also just a linguistic preference. You could describe it as "groundless" or "empty" or "nothing", or choose to not describe it at all.
That said, if you want to start labeling what is happening, you can start to make distinctions between things like "real" and "not real". For example, people will often call something not real if it's not shared among other people. If you're seeing pink elephants and nobody else are, they will tell you that it's not real. This is in fact where you get concepts like objective/physical reality: there seems to be a shared underlying ground from which a great amount of things are arising out from. But the mistake would be to think that this "shared ground" is nothing more than a label, just like "real" and "people".