I think cognitive behavioural therapy for phobias, which seems to work pretty well in a large number of cases, actually relies on helping people see that their fear is irrational.
It's alief vs. belief. It's one thing to see that, in theory, almost all spiders are harmless. It's another to remain calm in the presence of a spider if you've had a history of being terrified of them.
Desensitization is a process of teaching a person how to calm themselves, and then exposing them to things which are just a little like spiders (a picture of a cartoon spider, perhaps, or the word spider). When they can calm themselves around that, they're exposed to something a little more like a spider, and learn to be calm around that.
The alief system can...
Another monthly installment of the rationality quotes thread. The usual rules apply: