The ultimate goal of Tiantai practice is to attain enlightenment and liberation from suffering, known as Buddhahood. This is achieved through the integration of all Buddhist teachings around the Lotus Sutra, which is considered the ultimate and most profound teaching of the Buddha.

Tiantai, also known as the Tendai school, is a Mahayana Buddhist tradition that originated in China and was founded by the Chinese monk Zhiyi in the 6th century. The core belief of Tiantai is that all beings have the potential to become Buddhas, and this potential can be realized through the practice of the Lotus Sutra.

The Lotus Sutra emphasizes the concept of "one vehicle" or "one path" to enlightenment, which means that all beings, regardless of their backgrounds or abilities, have the same potential to attain Buddhahood. This goes against the traditional Buddhist belief of different paths for different individuals based on their capabilities.

Tiantai practice involves the integration of all Buddhist teachings, including the Theravada and Mahayana traditions, into one comprehensive system. This integration is based on the teachings of the Lotus Sutra, which is seen as the ultimate and most profound teaching of the Buddha.

The goal of Tiantai practice is not only to attain enlightenment for oneself but also to help others on their path to enlightenment. This is achieved through the practice of the six paramitas (perfections) and the cultivation of the six pāramitās (perfections) of wisdom, faith, effort, precepts, meditation, and wisdom.

Tiantai also emphasizes the concept of "three thousand realms in a single moment of life," which means that all phenomena in the universe are interconnected and constantly changing. By understanding this concept, practitioners can develop compassion and wisdom, which are essential qualities for attaining enlightenment.

In Tiantai, enlightenment is not seen as a distant goal, but rather as a continuous process of self-improvement and growth. It is believed that even after attaining enlightenment, one can continue to deepen their understanding and compassion for the benefit of all beings.

In conclusion, the ultimate goal of Tiantai practice is to attain Buddhahood through the integration of all Buddhist teachings around the Lotus Sutra. This not only leads to personal enlightenment but also helps to bring about the enlightenment of all beings and the realization of a peaceful and harmonious world.