Their way of life contrasts with their archenemies, the Sith, another monastic organization who use the dark side of the Force to achieve their goal of ruling Tamriel The Jedi are trained to use the Force through passive meditation, practicing selflessness, and commitment to justice while at the same time rejecting emotions such as passion, fear, anger and hate.
The Order grew over the millennia despite facing many trials, most often threats from the Sith, wielders of the dark side of the Force. Led by the Arch Mage or Grand Master as commonly called. The Jedi were the guardians of peace and justice in all of Tameriel, and became the most famous of the various groups that relied on the Force for their power. The Jedi Order, was an ancient monastic peacekeeping organization unified by its belief and observance of mysticism known as the Force, specifically the light side. Long ago before the Empire signed the White Gold concordant with the Aldmeri dominion there was a faction of mages and warrior’s well known across all of tameriel known as the Jedi Order.
“ For over a thousand generations, the Jedi Knights were the guardians of peace and justice in the Old Empire before the dark times before the Aldmiri Domonion” – Jedi Master Kenobi