“How clever you are, to know something of which you are ignorant.”

“Any ignorant fool can fail to turn someone else into a frog. You have to be clever to refrain from doing it when you know how easy it is.”

“I know everything I need to know already," Rigg always said... To which Father always replied,"See how ignorant you are? You don't even know why you need to know the things you don't know yet." "So tell me," said Rigg. "I would but you're too ignorant to understand the reasons why your ignorance is a fatal disease...”

“Only ignorance! only ignorance! how can you talk about only ignorance? Don't you know that it is the worst thing in the world, next to wickedness? -- and which does the most mischief heaven only knows. If people can say, 'Oh! I did not know, I did not mean any harm,' they think it is all right.”

“Being clever was when you looked at how things were and used the evidence to work out something new.”

“Craigengelt, you are either an honest fellow in right good earnest, and I scarce know how to believe that; or you are cleverer than I took you for, and I scarce know how to believe that either.”