When is it time to stop calculating risk and rewards and just do what you know is right?
Immediately. But that doesn't mean it's easy to just stop thinking things through and acting. I'm not saying that people shouldn't think about their actions. I'm just saying we shouldn't spend a great deal of time over-thinking everything. That's something I do a lot of. So many times in my life, I've over-thought about situations and probably missed out on some opportunities. If you have a decent moral compass and are able to discern the difference between right and wrong, why wait? Do what you know to be right.