Well, the Knights of swords on a quest to uphold truth and justice. It's all they're focused on, though sometimes their good intentions may get the better of them, and they act before thinking (if ill dignified). Knight/Swords obviously also has more than one positive attribute--because their element is the sword and the sword is ruled by air, you're cutting out the bs and thinking clearly. Based on these somewhat general descriptors of Knight/Swords, I'd say going careers that require you to think quickly and clearly, to be quick on your feet (they're the fastest of all the Knights), and fighting for justice and the truth, or just using a lot of mental power. Author, mathematician, chemist, engineer, lawyer, police, researcher, analyst, banker, stock broker, columnist, journalist, reporter, professor, etc. You have a lot of options to choose from. Whatever it is, it must require you to think analytically and logically, and in such a way where you're trying to discover or spread the truth, and uphold the law (as long it preserves justice).