On a scale of 1-10, 1 being, "Not at all" 10 being, "Completely" how would you rate this passage?
Yes? But that's ...just life. It says nothing at all to the question of whether one should be peaceful; it only says anything to the question of whether being peaceful will, in a given case, pay Standard Oil dividends this side of the grave. It's been a commonplace of ethics for as long as men have wondered about decent behavior that sometimes doing the right thing will get you killed; that strongly suggests that on a long enough timeline, the survival rate for everyone decent drops to zero; but what of it? It's one thing to be realistic about the long-term prognosis; it's quite another to abandon the project - which really means abandoning it in favor of another project with no better long-term prognosis - on those grounds.
If you need to, ask yourself what sorts of topics would convince you to respond "That's just life," to. For example, some people might consider learning by trial and error as "just life".
This passage didn't come from a "trial and error" conversation, but I'm just asking you guys to think on your own instead of having me tell all the details.