You have about 200 words to hold the reader’s attention. Most of the time even fewer, say 100, as the first pages of the book take up space for the chapter title and the quote.
You can't waste a single sentence.
You can afford it.
Your job is to make the reader turn the page. And the next. And the next.
Obsess over it.
The moment you slack, you’ve lost the reader, and the potential other 10 readers this reader would’ve told about your book, had they finished it.