Answer:
It shows that Augustus's family believes in the dual nature of pain. That is how every downside has its upside.
Explanation:
Without Pain, How Could We Know Joy?” How does this Encouragement define Augustus’s family’s spirituality?
This Encouragement defines Augustus's family's spirituality, in a way that they believe in the dual nature of pain. That is how every downside has its upside.
The title of the book is "The Fault in Our Stars" written by John Green. The quote is suggested by Hazel that the pain she and Augustus experienced was somehow part of the ultimate plan as they enjoy the joy more because of that pain.
Similarly, Hazel's father echoed the quote by saying that even though Hazel can feel the pain of losing Augustus, but the joy of loving him makes the pain worthy.