Lesson no. 3: Even the most rational people let their emotions get the best of them.
Darcy prides himself on being a very rational person. His opinions are always supported by facts, his standards unflappable, and his decisions firm and full of purpose. It then surprises everyone (himself most of all), when he realizes that he’s in love with Lizzie, the one woman in the county who’s absolutely determined to hate him. Lizzie is probably the first woman Darcy has ever met for whom he let his feelings get the best of him. When a normally rational person experiences that, it’s a powerful and intriguing thing. It’s also a very hard thing to ignore.