jojo, the quote you have on your signature comes from a Buddhist mantra, and even further, The Tanakh. many philosophers used that mantra to explore metaphysics or the thought of self within the world. such as Socrates, who immortalized the quote.
His understanding came from a learned perspective, that there is always more out there to learn. Einsteins famous quote brought it to light in the 1900s by stating, "Once you stop learning, you start dying." Yet Socrates wasn't dumb either. On the metaphysical side, he understood that his surroundings were truly irrelevant, because no one truly knew anything.
beautiful alone, yet there's more
Understanding whats around you was said to be false, based on only senses your body possess, they look deeper into the spirit for enlightenment.
to look within and see nothing, is to become so much more of whats around you. "Ham-Sah" was the Tanakh/Torah revelation from god to moses, saying "I am that I am". The oldest understanding of humanity is that we come from the universe, and where once part of its unity. we will come back to its unity and so in the process of our individual existence, must be reminded of our origin.