Bankei Yotaku, a Japanese Zen master from the 17th century, left a lasting legacy through his teachings that continue to impact the modern world. His approach to Zen Buddhism, known as the "Unborn" or "Unborn Mind" teaching, has had a profound influence on not only the practice of Zen, but also on other areas such as psychology, philosophy, and mindfulness.

One of the key aspects of Bankei's teachings is the concept of the "Unborn." This refers to the idea that our true nature, or Buddha nature, is already present within us and does not need to be attained through any external means. This goes against the traditional belief in Buddhism that enlightenment must be achieved through rigorous practice and meditation. Bankei's emphasis on the innate nature of enlightenment has resonated with many in the modern world who are seeking a more accessible and practical approach to spirituality.

Bankei's teachings also emphasize the importance of living in the present moment, rather than getting caught up in past regrets or future worries. This concept of mindfulness has become increasingly popular in the modern world, with practices such as meditation and mindfulness becoming more mainstream. Bankei's teachings on living in the present moment and letting go of attachments have provided a framework for modern mindfulness practices.

Furthermore, Bankei's teachings on non-duality have had a significant impact on modern philosophy and psychology. His emphasis on the interconnectedness of all things and the illusion of the self has influenced the work of philosophers such as Alan Watts and psychologists such as Carl Jung. Bankei's teachings have also been incorporated into various therapeutic approaches, such as Acceptance and Commitment Therapy (ACT), which focuses on accepting one's thoughts and emotions rather than trying to change or control them.

In addition to his teachings, Bankei's legacy also includes his approach to teaching and spreading his message. He was known for his simple and direct style of teaching, often using stories and anecdotes to convey his message. This approach has been adopted by many modern Zen teachers and has made Zen Buddhism more accessible to a wider audience.

In conclusion, Bankei Yotaku's teachings on the "Unborn," mindfulness, and non-duality have had a significant impact on the modern world. His emphasis on the innate nature of enlightenment and living in the present moment has resonated with many seeking a more practical and accessible approach to spirituality. His teachings continue to inspire and influence people from all walks of life, making him a timeless and revered figure in the world of Zen Buddhism.