Big Bang Theory Quote
Leonard: You know, there's a foundational idea in string theory that the whole universe may be a hologram.
Penny: What do you mean?
Leonard: Well, the holographic principle suggests that what we all experience every day in three dimensions may really just be information on a surface located at the farthest reaches of our cosmos. So it's possible that our lives are really just acting out a painting on the largest canvas in the universe.
Penny: Huh.
Leonard: What?
Penny: Sometimes I forget how smart you are.
(kisses Leonard)
Leonard: You should visit more often.
Quote from S06E05 - The Holographic Excitation