the origin, agenda, abilities and philosophy of the sith are intertwined with their relationship to the force. with proper training, the force may be called upon by rare individuals capable of "sensing" or "touching" it to achieve extraordinary feats such as telekinesis, precognition and mental suggestion. not all psychological states are conducive to employing the force; discipline is required. however, both quietude and focused, intense passion alike can be effective. the sith originated in a species of force-sensitive warriors who discovered the efficacy of passion as a tool to draw on the force approximately 6,000 years prior to the events of the first "star wars" film. fully embracing this approach, they became defined and corrupted by it.