Answer:
"After days and nights of incredible labour and fatigue, I succeeded in discovering the cause of generation and life; nay, more, I became myself capable of bestowing animation upon lifeless matter."
Step-by-step explanation:
This is the sentence that best shows how the story is an allegory that serves as a warning that it is dangerous for man to try and assume the power of creating life. In these lines, we see how Frankenstein was obsessed with exactly this pursuit. He tells us that he spent many days and nights of work and fatigue. Moreover, he also tells us that the purpose of all his effort was to learn how to bestow life upon lifeless matter.