Yes, you're right," her mother said. "So many
things in our midst and in the world outside. How
can we possibly know about everything? And even
when we do know about something, we often can't
understand it completely, can we?".
Explain. (from the chap. Madam rides the bus)

Dear student
This is a conversation between Valli's mother and her aunt. While they both were conversing, her mother talked about the endless possibilities in the world, one was unaware about and even if one knew it was not easy to understand everything.

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