How can one look happy when he is thinking about the anomalous Zeeman effect? Wolfgang Pauli
Mornin' ladies, my goodness don't you look happy. Must be cuttin' somebody up pretty good. Andy Griffith
A colleague who met me strolling rather aimlessly in the beautiful streets of Copenhagen said to me in a friendly manner, "You look very unhappy”; whereupon I answered fiercely, "How can one look happy when he is thinking about the anomalous Zeeman effect?”. Wolfgang Pauli