act on instinct said:
to say it’s about doing the right thing still leaves the actual moral underneath, what is the right thing to do?
The right thing to do is the thing that benefits all instead of one. Acting selflessly for the greater good.
That’s pretty much what the phrase means.
Not to dive into moral philosophy, but it’s a bit more nuanced than that. Would you kill someone to stop the spread of a disease if you are guaranteed it won’t get to the world at large? Or would you quarantine them and risk it getting out to infect millions?
^ btw this has nothing to do with current events, just a good philosophy example.