Obi-wan Kenobi was chosen by a Master when he was a few months shy of his tenth birthday. Twenty plus years later, the galaxy as a whole has rather a lot of cause to regret that. (The longer the war drags on, the more Qui-gon Jinn finds to question; about himself, about the events of history, and about the Sith Lord who was once Jedi Knight Obi-wan Kenobi.)