Answer:
It means we all grow every day to become what God wants us to become
We can actually deduce here that the book that the author use in the passage is: Sibling relationships.
<h3>Who is an author?</h3>
An author is actually known to be a person who writes, publishes and sells the published book. Authors share their knowledge, expertise and experience through writing.
We see in the attached image the passage that completes the question.
Thus, the actual book the author used in this passage is that of sibling relationship.
Learn more about author on brainly.com/question/15816956
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The best time to determine voice & tone in writing is when you are in the beginning/middle of the passage/book/article because you will see what the author is going to talk about and then how he feels about it.