In this excerpt from Alice Gerstenberg’s Fourteen, which lines reflect the idea of how fickle, or quick to change their minds, some people can be? ELAINE: [Following.] But mother, wasn’t it nice of Oliver Farnsworth to send a Prince in his place? MRS. PRINGLE: Didn’t I always say that Oliver Farnsworth was the most considerate of men? ELAINE: I think I shall like Mr. Farnsworth. MRS. PRINGLE: Silly child! It is too late now to like Mr. Farnsworth. It’s time now to like the Prince. [Starting out.] I always manage somehow to be the most successful of hostesses! Thank God for the blizzard!

To be fickle, as the question states, is to be quick to change your mind. In This excerpt, Elaine and Mrs. Pringle are having a conversation about Oliver Farnsworth.

At the beginning and throughout their conversation, Elaine seems to have a positive opinion about Oliver, complimenting his kindness. Mrs. Pringle responds in agreement, stating that she always considered him to be "the most considerate of men".

Her opinion however changes. While it seems that Mrs. Pringle originally wanted Elaine to find interest in Oliver, she backtracks on her recognition of his kindness and tells Elaine to find interest in the Prince instead. She quickly changed her mind about Oliver and Elaine being a couple and now wants Elaine and the Prince to be a couple.