Beth Bridges : Favorite equation? Come on, I know you have one.
Harold Finch : Pythagorean Identity.
Beth Bridges : Okay.
Harold Finch : I knew you'd disagree. What's yours?
Beth Bridges : Euler's Identity. It's so beautiful.
Harold Finch : Beautiful?
Beth Bridges : Yeah. At first, you don't realize the implications, and then it hits you. It's the five most important constants, E, I, 1, 0 And Pi. All linked together. It's like the secrets of the cosmos distilled into a sonnet.