Created by David Gaider, the Sith Code is the perfect summary of the Sith philosophy. It's actually partly inspired by Adolf Hitler's Mein Kampf, with Gaider deliberately inverting the Jedi Code ...

Obi-Wan knew that such a relationship was against the Jedi code. Shouldn’t a member of the Jedi Council be concerned about someone of Quinlan Vos’ reputation falling in love with a Sith?