The quote by the White Queen highlights the idea that a good memory should be able to remember things both from the past and into the future, not just dwell on what has already happened. It suggests that focusing solely on history or past events limits one's understanding and potential, emphasizing the importance of foresight and present awareness.
This remark can also be seen as a playful critique of how people often only reflect on what has already happened instead of learning and preparing for what is to come. Lewis Carroll's words encourage a more balanced approach to memory—valuing both past experiences and future possibilities.