In the quote from Lewis Carroll's "Through the Looking-Glass and What Alice Found There," the unicorn addresses someone by saying, "Well, now that we have seen each other," which suggests that both characters are meeting for the first time or recognizing each other's presence. The unicorn then offers a reciprocal gesture of belief, stating, "if you'll believe in me, I'll believe in you," emphasizing mutual trust and the importance of belief in their relationship.

This exchange highlights a theme of mutual understanding and the power of belief in forming connections. The dialogue reflects the whimsical and philosophical tone common in Carroll's work, where characters often explore concepts like trust, perception, and reality in a playful and thought-provoking manner.