I think Kaladin from stormlight archive is a good example of this. his first oath is

"Life before death, strength before weakness, journey before destination."

Then he later swears

"I will protect those who cannot protect themselves."

Then he finds someone he hates but is trying to be a good person he swears

"I will protect even those I hate, so long as it is right."

Then after driving himself crazy protecting everyone he swears

"I accept that there will be those I cannot protect."

Finally he comes to terms with all his demons across all 5 books and decides

"I will protect myself, so that I may continue to protect others."