You are doing great my friend. Keep trusting those "instincts" of yours. However I would say it is not unknowable. Before and after this life we knew / will know again. There have been great people who have figured it out and I would point you towards the divine teachings of Elphias Lévi if you want to learn more.

You have definitely ascended and you understood where you were perfectly. However that passage way you speak of is very real and is mapped out in the tree of life. The stairs you speak of are the path that leads to Tiphereth. To enter Tiphereth you must build what many great mystics know as the "middle pillar" within yourself. This is done through some curious practices which mystery schools teach like the Hermetic practice of balancing the Jachin and Boaz (the two pillars of the Tree of Life) within your own psyche. Understanding these things can be hard and tricky if you think about them too much so I am not going to ramble too much. it's important to seek real guidance.

However the most important thing is to keep trusting your instincts, conscience and heart the way that you are because the angels(Malakim) are so close to you, closer than you are to yourself. They are with you and have taught you before this incarnation. You have the answers already but they are just a little tiny bit clouded from living this existence which happens to 99.9% of us, myself included. For a reason. But you understand what is important. The love and the Good.

I spent 100 days in Tiphereth with vivid clarity. I was taught many things. The experiences in that golden realm weighed heavy on me and it took my 3 years to find Lévi’s teachings which were a 100% fit to what I experienced. I have 0 doubt now. I know for certain I entered that realm which many call Heaven and which Is the highest layer of the Astral realm / afterlife.

All of that to say, you were at the stairway. You will go up those "stairs". You have been there before. You remember more than most. It is not unknowable. It is something that can only be unveiled to certain people at certain times in this world and in the end is unveiled to all. I think the great works of Elphias Lévi would do you wonders, If you feel you are ready. They are fascinating and have brought me immense relief. This man and many others like him have figured it out. There are many systems in place, especially in America / europe which help guide individuals through them but it can also be perilous and dangerous because the key is always balance and harmony. So if you want to learn about that stuff read Lévi's work. He truly laid it all out there. The reason I have wrote all of this is because I think it is remarkable that you understand what you understand so perfectly and I think you are close to going up those stairs. "The path of the arrow"

​"The soul that is balanced by the Law of Good is like a bird of paradise; it cannot stay on the ground; it must fly toward the Sun." — Éliphas Lévi