"All at one time?"

"No, not more than three at the same time. Don't lecture me, Doctor, I
am incorrigible. When I work, I don't play."

"And when you don't play you work, occasionally; well, I think Euclid
will do you good."

"I won't take it as a prescription, Doctor!"

"A thorough course of mathematics would do more for one of your
flighty mind, than anything else; you want chaining down to the severe
logic of lines and angles."

"To the solution of such profound problems as, that the whole of a
thing is more than a fraction of it; and things that are exactly alike
resemble each other, for instance, eh?"

"Pshaw! you will make fun of everything. Will you ever reach
discretion, and deal with things seriously?"

"I was never more serious in my life, and could cry with mortification
over my lost, idled-away hours, you never believed in me, and are not
to blame for that, nor have I any promises to make. I am not thought
to be at all promising, I believe."

"Bart," said the Doctor, seriously, "you don't lack capacity; but you
are too quick and impulsive, and all imagination and fancy."