When Robin is returning Robert Loxley's sword home to Loxley's father, he sees the phrase "Rise and rise again until lambs become lions." on the hilt of the sword. That phrase led to Robin taking up his father’s cause for justice and freedom. A rallying cry for a mission - to never give up no matter how many tries it takes.
Never give up. Keep fighting. Rise up, mighty warriors.
What are you fighting for?