Ah, I think I finally see what you're getting at, and possibly what qwints and Czhorat were saying too. I fear I may have been being obtuse.
What value does the drug addict who steals to maintain his habit need to reform? What value does the 15 year old who killed a man while joy riding at excessive speeds need to reform?
In the first case, the addict need to value a productive life and healthy relationships more than drugs. The joy-rider needs to value the safety of others more than his fun. That change of heart is what I've been talking about. BUT, those values do not need to change in order for behavior to change if other values can be leveraged. For example, the joy-rider obviously values fun. If we threaten to take his fun away, we can make him behave on that basis. He might still have no regard for the safety of his fellows, but fear of loosing his ride may keep him from reckless driving.
I have been focussing on changing a person's motivations, which cannot be done from the outside in, but if we are talking
only about behavior, then existing motivations can be exploited to achieve the desired result. The pragmatic result is the same whether the killer's heart is changed so that he no longer wants to kill or if he is too intimidated by the prospect of punishment to act on his desires. Hence, a criminal who behaves for no other reason than to avoid further punishment can be considered rehabilitated.
If that's all you've been getting at, then I apologize for not seeing it sooner. I've been looking at it from a perspective of changing people, while you're just concerned with getting them to behave (which is, really, all the state
should concern itself with). I think we've been having two distinct discussions–1.) the nature of good and evil and 2.) crime prevention–but I didn't see their distinction until now.
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I said I'd answer questions put to me:
What do the words "good" and "evil" mean to you, Mr Tweedy?
Concisely: To be good is to be in line with the will of God. Good things make God happy. To be evil is to be outside the will of God. Evil bums God out.
Does it concern you that what is morally acceptable has changed considerably over the years?
Not in the least. I consider the standards of society to be utterly irrelevant in determining what is right or wrong. There are many aspects of my society that are evil, and I condemn them as such and do what little I may to change them. There are many aspects which are good, and I appreciate and encourage those. I do not think that there has ever been a perfect society and I don't expect one any time soon. Hence, there will always be some degree of dissonance between the moral standard of someone who seeks to obey God and of the society in which they live.
How can we measure such a thing and, if we can't, of what use is it as a concept?
I think that I am generally able to judge whether a given action is good or evil (based upon various inputs God has provided for me, which is probably more explaining than you're looking for) and that is useful to me in determining what I should do.
Would you agree that there's most likely something in our behaviour today that would be equally shocking and shameful to our descendants, or do you think we've reached the state of understanding "absolute good"?
The first one. No society (or person) has ever been absolutely good.