Woe betide him, and her too, when it comes to things of consequence, when they are placed in circumstances requiring fortitude and strength of mind, if she have not resolution enough to resist idle interference... It is the worst evil of too yielding and indecisive a character, that no influence over it can be depended on. You are never sure of a good impression being durable; everybody may sway it. Let those who would be happy be firm.

Northanger abbey, and Persuasion (ed. 1853)