What is the primary cause of a restless mind and how can one achieve peace according to the philosophy in Chapter 14?

According to the wisdom in Chapter 14, the primary reason for a restless mind is getting stuck in the illusion of duality. This feeling of separation—believing "I am different, and people are different"—is caused by ignorance and delusion. The path to peace, as outlined in the chapter, is to acquire the "knowledge of oneness." This involves purifying the mind, often through the Guru's teachings, to completely abandon the concept of duality. By understanding that an unbroken, single essence fills everything and that there is no place empty of this divine presence, one can become peaceful and ultimately attain the state of one's true nature.