“It is a perennial philosophical reflection that if one looks deeply into oneself, one will discover not only one’s own essence but also the essence of the universe. For as one is a part of the universe as is everything else, the basic energies of the universe flow through oneself, as they flow through everything else. So it is thought that one can come into contact with the nature of the universe if one comes into contact with one’s own nature.”

Stanford Encyclopedia of Philosophy

This reminds me of one of my favorite quotes from Anais Nin: “The personal life deeply lived always expands into truths beyond itself.”