An Oath is a long term goal a Knight has sworn to pursue to completion. Generally an Oath will take a long time (multiple sessions of play, possibly across several worlds) to complete and the best course to pursue is not always obvious. While a Knight may have multiple active oaths in the fiction, the character they will only be pursuing the Oath on their character sheet mechanically, and will only change that Oath when it has been resolved or the Knight Forsakes it.