Tu-Surak, also known as the Way of Surak, was the primary belief of a majority of the Vulcan species and was developed by the "Father of Logic", Surak. The teachings of Surak preached six virtues to its followers that served as a guide on what to do in their lives rather than what not to do. (Last Unicorn RPG module: The Way of Kolinahr: The Vulcans)