I believe its: "Ignorance is curable, but stupid's for life."
I think the lines stems from Richard Dawkins: "To claim equal time for creation science in biology classes is about as sensible as to claim equal time for the flat-earth theory in astronomy classes. Or, as someone has pointed out, you might as well claim equal time in sex education classes for the stork theory. It is absolutely safe to say that if you meet somebody who claims not to believe in evolution, that person is ignorant, stupid or insane (or wicked, but I’d rather not consider that). If that gives you offense, I’m sorry. You are probably not stupid, insane or wicked; and ignorance is no crime ..."