Darshan Singh is a person who followed Sant Mat, which is a religious path that focuses on meditation and spiritual development. Like following rules on how to play a game, Sant Mat has specific guidelines to follow to reach inner peace and enlightenment. Darshan Singh was a teacher of Sant Mat, meaning he helped others learn about and practice this faith. Just like in school, we have teachers who help us learn new things, and Darshan Singh was a teacher of Sant Mat.