As much as possible for the least amount of harm possible and the least amount of wasted time and resources, obviously. Which varies on a case by case basis.
I mean if it was practical, you'd give your friends 2 billion units of happiness, and then after turning the cheek to your enemies, grant them 1.9 billion units of happiness, but living on planet earth, giving you 80% of the crap you gave me seems about right.
...living on planet earth, giving you 80% of the crap you gave me seems about right.
Consider the consequences if everyone follows your rule. Assume someone gives you one unit of crap, possibly accidentally. You respond with 0.8 units. (It's hard to measure this precisely, but for the sake of argument let's assume that both of you manage to get it exactly right). He, in turn, responds with a further 0.64 units of crap. You respond to this with 0.512 units.
This is, of course, an infinite geometric series. The end result (over an infinite time period) is t...
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