The Sixth Patriarch, also known as Huineng, holds a significant role in the lineage of Chan Buddhism. He is considered to be the founder of the Southern school of Chan, and his teachings have had a lasting impact on the development of Chan Buddhism.

Huineng was born in 638 CE in Guangdong, China. He came from a poor family and was illiterate, but he possessed a deep understanding of Buddhist principles. He was drawn to Chan Buddhism and sought out the Fifth Patriarch, Hongren, to become his disciple.

Under the guidance of Hongren, Huineng underwent intense training and meditation, eventually achieving enlightenment. Hongren recognized Huineng's potential and passed on the robe and bowl, symbolizing the transmission of the Dharma and the succession of the lineage, to him. This act made Huineng the Sixth Patriarch of Chan Buddhism.

As the Sixth Patriarch, Huineng traveled extensively, spreading the teachings of Chan Buddhism and attracting many followers. He emphasized the importance of sudden enlightenment, rejecting the idea of gradual progress towards enlightenment. He also stressed the importance of meditation and the use of koans, or paradoxical statements, to help students break through their conceptual thinking and reach a state of enlightenment.

Huineng's teachings were revolutionary and challenged the traditional Buddhist practices of the time. He emphasized the idea that enlightenment is attainable for all, regardless of social status or education, and that it can be achieved in an instant. This went against the belief that enlightenment could only be attained through years of rigorous practice and study.

Huineng's teachings had a profound impact on the development of Chan Buddhism. His emphasis on sudden enlightenment and the use of koans became fundamental aspects of Chan practice. He also helped to bridge the gap between the elite and common people, making Chan Buddhism more accessible to the masses.

Today, the lineage of the Sixth Patriarch continues to be passed down through the Southern school of Chan Buddhism. His teachings continue to inspire and guide practitioners towards enlightenment. The Sixth Patriarch's influence on Chan Buddhism is undeniable, making him a crucial figure in the lineage of this school of Buddhism.