It's something Eliezer talks about in some posts; I associate it mainly with The Twelve Virtues and this:

Some people, I suspect, may object that curiosity is an emotion and is therefore "not rational". I label an emotion as "not rational" if it rests on mistaken beliefs, or rather, on irrational epistemic conduct: "If the iron approaches your face, and you believe it is hot, and it is cool, the Way opposes your fear. If the iron approaches your face, and you believe it is cool, and it is hot, the Way opposes your calm."