What does the sentence "a gentleman doesn't fight for his life" mean?

There is a saying that "wealth and freedom are determined by heaven, and a gentleman does not fight for his life." This sentence means that a gentleman should obey his own destiny and destiny, and don't force anything.

"Gentlemen don't fight for their lives" used to mean that gentlemen should accept life and not fight against it. Source: Wang Wang's Night in a Lonely City V: "Since my brother left his hometown, in my life for more than ten years, what I lacked and didn't have was sensible. I accept my fate,' a gentleman doesn't fight for his life'. I just want peace and satisfaction. "