This weekend, Jerry Seinfeld gave the commencement speech at Duke University and offered the graduates his three keys to life: 1. bust your ass, 2. pay attention, and 3. fall in love. Then, 10 minutes later, he added essentially a fourth key to life: “Do not lose your sense of humor. You can have no idea at this point in your life how much you’re going to need it to get through. Not enough of life makes sense for you to be able to survive it without humor.” “It is worth the sacrifice of an occasional discomfort to have some laughs. Don’t lose that.” “Humor is the most powerful, most survival-essential quality you will ever have or need to navigate through the human experience.” Amen.