What is the role of the Guru's teachings in achieving mental peace and understanding one's true nature?

According to the wisdom in Chapter 14, the human mind often gets stuck in duality due to errors like ignorance and delusion, which prevents a state of peace. The Guru's teachings play a crucial role in rectifying this. They provide the means for the 'purification of the mind,' which is essential to see beyond false separations. By following these teachings, one can turn away from ignorance and move toward the attainment of oneness. This knowledge of oneness, the understanding that a single essence pervades all, is what ultimately brings peace and allows an individual to realize their true, undivided nature.