Jean Klein's teachings revolve around the concept of Advaita, which means non-duality. According to Klein, the root cause of suffering is the illusion of separation between the individual self and the absolute reality. He believed that true liberation can only be achieved by realizing the non-dual nature of existence.

Klein emphasized the importance of self-inquiry and introspection in his teachings. He encouraged his students to question their beliefs and perceptions, and to look beyond the limitations of the mind. He believed that true understanding can only come from direct experience, rather than intellectual knowledge.

One of the key aspects of Klein's teachings is the concept of "beingness." He taught that the ultimate truth is the state of pure being, which is beyond the fluctuations of the mind and the changing nature of the world. According to him, suffering arises when we identify with the ever-changing aspects of our existence, rather than recognizing our true nature as pure being.

Klein also emphasized the importance of living in the present moment. He believed that true liberation can only be found in the present moment, as it is the only reality that truly exists. By letting go of the past and the future, one can fully embrace the present moment and experience the peace and contentment that comes with it.

In terms of practical guidance, Klein encouraged his students to practice meditation and mindfulness as a means to quiet the mind and cultivate a deeper understanding of the self. He also emphasized the importance of surrender and letting go of control, as the ego's need for control is often the source of suffering.

Klein's teachings also address the concept of liberation, which he believed is not something to be attained, but rather a state of being that is always present. He taught that liberation is not a destination, but rather a realization of the non-dual nature of existence. By letting go of the illusion of separation and embracing the present moment, one can experience the true freedom and peace that comes with it.

In conclusion, Jean Klein's teachings offer a profound understanding of the human experience and provide practical guidance for overcoming suffering and finding liberation. Through self-inquiry, living in the present moment, and letting go of the illusion of separation, one can experience the true nature of existence and find lasting peace and contentment.