There are many Mystery Schools, from Qaballah to Theosophy, designed to teach you ----You. The axiom above all things know thyself, is justly dealt with in these schools if the student applies themselves to their studies; However, it isn't all that complicated when it comes to understanding that your True Nature, is Spirit and the body is how the Spirit becomes aware of Itself.
Using the example of a mirror, there is a dark side and a light side to any mirror image. Dark side is the medium of the mirror and the light side is the reflective part of the mirror. Now look at Life, as a mirror. What is the medium of Life is Limitless-Energy, what is the reflective part of Life is the limited light that life forms are made of; we call these the Alive. Limitless energy cannot be seen, so it is describe in the Qabalistic teachings ad the "Dark Light" or the "Dark Fire", without limits there is nothing to see. The Limited Light, is the time-space nature of our material world, where all things are reflections on Limitless Energy---the Dark side of the Mirror reflects the Light side of the mirror. So too make this simple, you are both sides of the Mirror that reflects psycho-dynamic images. On the infinite -dark side of Energy, you are Life who reflects upon itself, limited conceptions of awareness....these are the Alive. The Alive being self-images of definition, reflected upon for the purpose of self-awareness. So if you are following this scenario, you now know that you are both the Life and the Alive. The Life is unseen, and can only see itself----by a process of self-reflection---the Alive. Since images require both a beginning and ending, images are mortal. Life is conscious Energy, without any definite image, so it images itself using a process known as imagination, which is a psycho-dynamic process of definition and desire. Definition being images, Desire being the Divine Frenzy (Passion/Will to be) that creates vibration which is the potential for form..This Will to be, is Life. To know thyself, is what all this Universe is about....Life Knowing Itself as a alive presentation of I AM Me. So your purpose in Life is to expand and liberate the Alive, who are aware through perception, from there own perceived limits.
Easy enough to understand ....Right? Not! Many of us believe that we have to correct those who we deem wrong. But for the"image of God" (Those who are Imagination) Divine Freedom of Choice, says that this is not so. Above all things Know thyself, is the creed of Life and is also the creed of the Alive, who reflect life as living images. That would be us, the Hu [Mandarin Chinese word for God}Man [ man is from the Hindu word Manas which means- mind], the god-minds on this earth. You see as God-Minds (imagination) we decide our own images by the art of Perception. I think--therefore I am, merely states that by my perspectives I become. That is freedom of choice. So to conclude this short essay on a Long Story of Creation, you are both the Life and the alive. As Life, how you define yourself is how you live as an alive image. To Declare, " I Am spirit who defines and owns its own body."....gives you the freedom to choose your Day. To give up you freedom of choice by allowing someone else the power to supply your definition....is to "seek a living" and thus you have no day----you live in yesterday's. My purpose is to be and as the Spirit-Life of my body, I decide what being alive is! There is no outside authority---------------my inside authority authorizes me! In our world, designed by the ambitious and the greedy foundation of survival thinking.....we tend to forget that we are desired into presence, loved into being, by Life ----as its self-image. No person ever had to approve of you----your valve has been stated by your presence alone! You are good enough for Life----you are good enough for the Alive. I am Life and the Alive---I am the Transmitter and the Transmitted! Thus we are both immortal and mortal at once outside of time as an immortal soul and inside of time as a mortal soul-image. It is all in the perception of self! Seek out a mystery school, they will free you from the definition enforced by Rulers and give you back your "Will-to Be"!