its from Knights of the Old Republic. The final boss Darth Malak says this after you defeat him, as he dies he realizes that compared to you he was nothing, despite all of his schemes and plots he would never be as strong as you.
Personally its my favorite era of star wars, mostly because of Darth Revan, and the Sith Triumvirate are some of the most interesting force users to me.
they had a clone wars where Ahsoka didn't exist. This was before the released the cartoon. They had other characters and story lines, which they threw out once they made the new clone wars show. For example, Obi-Wans love interest in the original clone wars was a fellow jedi master, not the Dutchuss of Mandalore. Also, they had Durge who is basically unkillable.
Oh no, the 2003 series takes place before the newer one, before Anakin became a knight. It was only after he became a knight did he get Ahsoka as his padawan
the 2003 series does both. It ends right before Revenge of the Sith. They retconed all of the stuff before they made the newer show. The new show isn't bad, it's just I was used to all of the old canon before they threw most of it out