The Jedi Code was a code of conduct that established the rules and beliefs of the Jedi Order. The most commonly known version was founded by Jedi Master Odan-Urr.
The code read:
"There is no emotion, there is peace,
There is no ignorance, there is knowledge,
There is no passion, there is serenity,
There is no chaos, there is harmony,
There is no death, there is the force."
- The Jedi Code