A Full-Fledged editor needs to make this the main form of the question:
Mr. Antolini's quote, "The mark of the immature man is that he wants to die nobly for a cause, while the mark of the mature man is that he wants to live humbly for one." suggests that true maturity involves prioritizing a meaningful and humble way of life over seeking glory or recognition through dramatic actions. It emphasizes the importance of quiet dedication and service to a cause, rather than seeking grand gestures of sacrifice.
The adverb is "nobly," e.g., He performed his task nobly.
Mr. Antolini advised Holden to find a deeper connection with himself and to be more open to learning and exploring new ideas. He also warned Holden about the dangers of isolating himself emotionally and the importance of navigating his life with care and consideration.
That is the correct spelling of the adjective "nobly" (in a noble or just manner).
He suggests, in essence, that he be less rebellious because he is setting himself up for a fall. _____ He gives him a whole smattering of advice - how education is really, in the end, worth the time, how Holden should find what he's passionate about b/c it'll prevent him from a fall...he gets pretty chatty in this scene. Check out the link to read up more on that moment. He writes down this quote and tells him to keep it with him: The mark of the immature man is that he wants to die nobly for a cause while the mark of the mature man is that he wants to live humbly for one.
The word or term nobly refers to handling something in a noble way
On the bus, the young man nobly gave up his seat to the pregnant lady.The kind man nobly bowed to the king.Noble means worthy, respectable
"… it is for us, the living, rather, to be dedicated to the cause that those who struggled here have thus far so nobly advanced.…"
magnificently, regally, majestically
The adverb for noble is nobly.
newly, nobly
Gallantly