How does one overcome the illusion of separation and achieve a state of non-duality based on the philosophical teachings provided?

According to the wisdom in Chapter 14, overcoming the illusion of separation requires a fundamental shift in perception guided by a Guru. The mind gets stuck in duality due to errors like ignorance and delusion. The path to non-duality involves first recognizing that the intellect establishing this separation is pure ignorance. The next step is purification of the mind through the Guru's teachings, which leads to the knowledge of oneness. One must firmly hold the feeling, as Baba says, to "See Me alone in everything," pushing away the delusion of Maya and controlling one's vision until the sight is filled with the oneness of one's true nature.