You never do.

You learn more important things each day, and by the time you are old enough to die, you have almost enough sense to know how to live comfortably.
Pity, isn't it ?" "Yes," said Miss Amelia, "it's an awful pity, but it's the truth.

Is your mother being educated too ?" "Whole family," I said.

"We learn all the time, mother most of any, because father always looks out for her.

You see, it takes so much of her time to manage the house, and sew, and knit, and darn, that she can't study so much as the others; so father reads all the books to her, and tells her about everything he finds out, and so do all of us.
Just ask her if you think she doesn't know things." "I wouldn't know what to ask," said Miss Amelia.
"Ask how long it took to make this world, who invented printing, where English was first spoken, why Greeley changed his politics, how to make bluebell perfumery, cut out a dress, or cure a baby of worms.