Although the question is not included in this excerpt, we can still analyze the quote to discuss its meaning.
This quote comes from Chapter 4 of the book Frankenstein. In this passage, Victor Frankenstein is talking about his experience creating the monster. He tells us that he is not crazy before describing these events. He swears that everything he describes is true, and that the outcome is achievable through scientific work. He also describes the amount of work that he had to endure in order to discover how dead matter could be given life.