Ingress of the House of Arch

"It is not a bad thing, to be careful," Mary says. (Carefully.) "It is good to be watchful and to be prepared, and not to do things that are stupid. But you ought to think for yourself, too, in choosing how you will be careful, and what you will prepare."

(Mary doesn't quite see the irony in telling Ingress that she should listen to Mary, and thus think for herself.

"Grown-ups can be very clever, but they are wrong sometimes too. You ought not only to listen to anyone."