Emma by Jane Austen

Opening line:

Emma Woodhouse, handsome, clever, and rich, with a comfortable home and happy disposition, seemed to unite some of the best blessings of existence; and had lived nearly twenty-one years in the world with very little to distress or vex her.

Pride and Prejudice by Jane Austen

(Famous) opening line:

It is a truth universally acknowledged, that a single man in possession of a good fortune, must be in want of a wife.