"Once you embrace the Republic, the power of all Jedi is ready to serve you."
The Jedi Order, known by some by it's full name the Holy Order of the Jedi Knights, is an ancient monastic peacekeeping organization unified by belief and observance of the Force, specifically the light side. The Jedi are the guardians of peace and justice in the Galactic Republic and throughout the galaxy, and are perhaps the most famous of Force user organizations. Led by a series of Jedi Councils, chief among them being the High Council, the Order has grown over millenia despite facing many trials, most often threats from the Sith, and more than on one occasion have faced extinction.
The life of a Jedi is one of meditation and reflection. A Jedi follows the will of the Force. At a young age, usually infancy, a child that is identified as Force sensitive is taken by the Jedi Order, and begins specialized training to teach the being the basics of the Force and the Jedi way. If not chosen by the age of twelve, the failed Initiate is removed from training and into one of the many branches of the Jedi Service Corps. Adolescent and adult Initiates are rare, but allowed should a special circumstance surround the individual.
After a time as a Padawan under a Jedi Knight or Jedi Master, usually six to ten years, the Padawan becomes a Knight themselves. Many Jedi never advanced beyond this point, however are expected to aid the Order, train Padawans, and train and hone their abilities. Should a Knight show a high level of proficiency, they become a Jedi Master. From the Jedi Masters, members of the Jedi Councils are chosen, with the wisest serving on the High Council, which consists of five lifetime members, four long-term (ten years) members, and three limited-term (five years) members, one of whom assume the title of Master of the Order. Should the Master of the Order be above and beyond any Jedi in recent history, and current members of the Council, the High Council may bestow upon this person the rank of Grand Master.