The last sentence doesn't seem too relevant to the rest of it; a proposed litany should be short, elegant, and focused.
As for the rest of it: "learn to love finding out you were wrong" isn't quite it... it's much better to find out that you were already right. The thing I prefer to convey is more like "learn to love finding out you were wrong, conditional on your having actually been wrong". (Which is inelegant, but is not an attempted litany, just a description of what I'm getting at.) My usual litany of this type is "If I am wrong, I want to find out, so I can become more right."
I was meditating on the word "disillusionment" the other day, and it stuck me as odd that it has such a negative connotation... doesn't being disillusioned mean that you see a truth that was previously hidden from you by a mirage of falsehood? The human-universal negative emotional response to finding out you were wrong seems counterproductive in the extreme, and I'm still working towards eliminating it from my mind. So I crafted this brief litany, and I think that with some help from the LW community it could become a useful tool for rationalists, much like the Litanies of Tarski and Gendlin. My "first draft" is:
"If you love truth, learn to love finding out you were wrong. If you hate illusion, learn to love disillusionment. If your emotions are not appropriate to your values, do something about it!"
What say you?