In Star Wars, certain individuals are born with the power to access the "Force", an energy field that binds the universe together. A Force-sensitive individual can levitate objects, trick minds, and sometimes predict the short-term future. The Jedi believe that the best way to control the Force is by suppressing your emotions, and so follow a philosophy of detachment from the living world (including rejecting attachments such as romantic relationships). The Sith believe in encouraging strong emotion and using it to fuel the Force. Both seek peace in the galaxy.