Qui-Gon Jinn was a revered yet maverick and unconventional Jedi Master, Padawan to Count Dooku, and mentor to Obi-Wan Kenobi. Jinn often placed himself in conflict with the Jedi Council. He was deeply attuned to the Living Force, which contributed to his frequent taking side trips to help seemingly "pathetic life-forms." Despite his opposition to the council, he was regarded by many Jedi as very wise and clever.

Jinn served the Republic, the Jedi Order, and the Force his entire life, participating in actions against the Nebula Front and most famously during the Invasion of Naboo. It was Qui-Gon Jinn who discovered the Chosen One (Anakin Skywalker), on Tatooine during this crisis and was largely responsible for getting him trained as a Jedi. Even after his death at the hands of Darth Maul he played a major part in the future of the Jedi.

"Do not defy the Council, Master, not again."
"I shall do what I must, Obi-Wan."
―Obi-Wan Kenobi and Qui-Gon Jinn

"A broken circle."
―Obi-Wan Kenobi

"Qui-Gon Jinn, I will be thirteen in four weeks. You are my last chance to be a Jedi Knight."
―Obi-Wan begging Qui-Gon to accept him as his apprentice.

"You are a subject of a scientific experimentation. You will not be hurt, only studied."
―Jenna Zan Arbor

"There is no help for me now. There is only revenge."
―Qui-Gon directly after Tahl's death

"The situation here is not what it seems. There is something else behind all this, Your Highness. There is no logic in the Federation's move here. My feelings tell me they will destroy you."
―Qui-Gon Jinn to Queen Amidala

"Finding him was the will of the Force, I have no doubt of that."
―Qui-Gon Jinn to the Jedi Council

"I can only protect you. I cannot fight a war for you."
―Qui-Gon Jinn to Queen Amidala

"As far as your wisdom goes, you're no Qui-Gon Jinn!"
―Anakin Skywalker to Obi-Wan Kenobi

"When you travel the universe with Qui-Gon Jinn, you tend to learn a few things."
―Obi-Wan Kenobi to Anakin Skywalker

"Jinn always does things his own way, always sure he is right, always incredulous if we do not see it his way. Some think he is a gray Jedi."
―Tyvokka on Qui-Gon Jinn

"Qui-Gon Jinn was perhaps the greatest Jedi alive, a commanding presence at Council, a strong and brave warrior who refused to be intimidated by even the most daunting challenge, and a good and kind man."
―Obi-Wan Kenobi

His deadly Duel:

At the Second Battle of Theed, Qui-Gon and Obi-Wan encountered and fought Darth Maul. The duo put up a great fight, but when Maul kicked Obi-Wan over an edge, Qui-Gon and Maul moved on, and passed through protective and impenetrable laser shields. They closed between them, separating the combatants for a moment. They also separated Obi-Wan and Qui-Gon. When they disappeared, Qui-Gon immediately attacked Darth Maul, and Obi-Wan rushed to help his Master. But the shields again prevented him from succoring his mentor. Although Qui-Gon was one of the best lightsaber masters in the Order, his mastery of Ataru combat style proved to be disadvantageous in the confined space of the reactor core. Also, Maul had the advantage of youth and pure strength, resulting in an exhausted Qui-Gon being hit with Maul's hilt then impaled with the Sith's saber. Enraged, Obi-Wan attacked the Sith, cutting his saberstaff in two and eventually killing him. With his last breaths, he told Obi-Wan to train Anakin as his dying wish. Qui-Gon was cremated in the Theed Funeral Temple.