Meaning of the word "a man can die but once" in English

What does "a man can die but once" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

a man can die but once

US /ə mæn kæn daɪ bʌt wʌns/
UK /ə mæn kæn daɪ bʌt wʌns/
"a man can die but once" picture

Idiom

a proverb meaning that since death is inevitable and happens only once, one should not fear it or should face it bravely

Example:
I will take the risk and join the mission; after all, a man can die but once.
He faced the danger without flinching, knowing that a man can die but once.