Alice realizes that remaining silent might be the best choice, as speaking doesn’t seem to sway the voices around her. To her astonishment, even though she doesn't speak, the voices collectively think in unison, indicating a sort of silent understanding or shared thought. This moment highlights the peculiar and whimsical nature of the world she is in, where conventional communication doesn't always apply.

Then there's no use in speaking. The voices didn't join in this time, but surprisingly, they all thought in chorus, revealing a unique form of communication. Alice reflects on the value of language, suggesting that words can be so powerful that they are worth a thousand pounds each, emphasizing the whimsical and exaggerated language typical of Lewis Carroll's imaginative story.