your answer would be, dionysus.
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through negative experiences we learn many things its sort of like karma if u do something bad to someone and u get a consequence u dont like the next time u wont do it again and as for positive ur not really learning anything and another example for negativity people didnt want barrack obama as president because they thought he was the worst and he was taking but now we have donald trump and hes is not anyone and shut down the government over sum petty stuff unlike barrack obama who shut down the government because they did not want to give health care to the community and now these people who want him out want him in now
if you've lost your book, i highly advise you to tell your teacher, or whoever is teaching you. there is no literal way for you to do your work without the book. although, there is an alternative. if you can find an online version of the book, then you don't need to ask, but if that's not an option, always ask.