In Tendai Buddhism, the relationship between mind and body is seen as inseparable and interconnected. This view is rooted in the belief that all phenomena, including the mind and body, are ultimately empty and interconnected.

Tendai teaches that the mind and body are two aspects of the same reality, known as the "body-mind" or "body-mind complex." This means that the mind and body are not separate entities, but rather two aspects of one whole being.

According to Tendai, the mind and body are constantly influencing and shaping each other. The mind affects the body through thoughts, emotions, and intentions, while the body affects the mind through sensations, perceptions, and actions. This interdependence is known as the principle of "mutual causality."

Tendai also emphasizes the importance of the body in spiritual practice. The body is seen as a vessel for the mind, and therefore, it is essential to take care of the body in order to cultivate a healthy mind. This can be done through practices such as meditation, mindful movement, and proper nutrition.

Furthermore, Tendai teaches that the mind and body are both subject to the law of impermanence. They are constantly changing and evolving, and therefore, it is important to not cling to any fixed idea of the self or the body. This understanding can help practitioners let go of attachments and cultivate a sense of inner peace.

In Tendai, the ultimate goal is to achieve a state of harmony between the mind and body. This is known as the state of "body-mind integration" or "body-mind unity." It is believed that by achieving this state, one can experience a deep sense of interconnectedness with all beings and the universe.

In conclusion, Tendai Buddhism views the relationship between mind and body as inseparable, interconnected, and constantly evolving. By understanding and nurturing this relationship, practitioners can cultivate a sense of inner peace and harmony, ultimately leading to a deeper understanding of the true nature of reality.