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JQuinton comments on Rationality Quotes March 2014 - Less Wrong
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I admit, I get horribly mind-killed whenever I realize I'm reading something by CS Lewis, especially anything from The Screwtape Letters. That's because years ago, the arguments in this book were used against me by a girl I was dating as a means to end our relationship (me being non-religious), who herself was convinced by her friends and family that we should break up.
That said, I was able to read this and appreciate it more clearly if I substituted the quote like so:
If we are attempting to spread good rationality around, would it be efficient to not try to convince people that rationality was "true", but instead attempt to promote good rationality by saying that rationality is "strong, stark, or courageous -- that it is the philosophy of the future"?
So you propose to spread rationality by encouraging irrationality?
Even assuming that this will work — that is, not just get people to buy into rationality (that part is simple) but actually become more rational, after this initial dose of irrational motivation — what do you suggest we do when our new recruits turn around and go "Hey, wait a tick; you guys got me into this through blatantly irrational arguments! You cynically and self-servingly pandered to my previously-held biases to get me on your side! You tricked me, you bastards!"? Grin and say "worked, didn't it"?
That seems to be what the quote is arguing.
The quote is spoken by a devil, who's deliberately seeking to destroy and devour a person...
The speaker does not himself believe that materialism is true; he is giving advice on how to make another believe a falsehood.
And do you think it's a good idea?
We aren't trying to promote the idea that rationality is true. We are trying to promote that it is useful.
More accurately, we have defined "rational" to mean "useful", and when we argue that something is rational, we are arguing that it's useful.
If you are, you are being irresponsible because you are not checking what people are going to do with this useful thing.
I can't know for sure that it won't come back to bite me, but I suspect helping people generally tends to be helpful. There are things that are easier to use to cause harm than to help, like nuclear weaponry, but in general helpful things seem to have improved humanity's standard of living, and made them care more about morality.
I don't actually think that teaching rationality is dangerous. I think that LW expects it to have an edifying effect, to change values for the better. So it is the claim of purely instrumental rationality that is the problem.
We are trying to promote the idea that it is useful because it is true.
The only senses in which you wouldn't say it's true are those in which that would be a type error.