In Star Wars, how is a Sith different from a Jedi?

Star Wars is a series of science fiction movies depicting events taking place in a fictional galactic empire filled with a mysterious force. The Siths and the Jedi are two cult-like orders in the galaxy, and are enemies. The Jedi are the guardians of peace and justice in the empire. In order to become a Jedi, one should succeed in the training offered by the Jedi Masters in the Jedi temple. The Siths, on the other hand, are devoted to the dark side of the force, which imparts to them evil characteristics like hatred, aggression and malevolence. The Siths want to acquire control of the galaxy by destroying the Jedi.