From Maria Popova, 5½ Timeless Commencement Speeches to Teach You to Define Your Own Success. Five great videos that are worth taking a minute to watch.

David Foster Wallace

“Twenty years after my own graduation, I have come gradually to understand that the liberal arts cliché about teaching you how to think is actually shorthand for a much deeper, more serious idea: learning how to think really means learning how to exercise some control over how and what you think. It means being conscious and aware enough to choose what you pay attention to and to choose how you construct meaning from experience. Because if you cannot exercise this kind of choice in adult life, you will be totally hosed. Think of the old cliché about ‘the mind being an excellent servant but a terrible master.’”

Ellen Degeneres

“For me, the most important thing in your life is to live your life with integrity, and not to give into peer pressure. to try to be something that you’re not. To live your life as an honest and compassionate person. to contribute in some way. So to conclude my conclusion: follow your passion, stay true to yourself. Never follow anyone else’s path, unless you’re in the woods and you’re lost and you see a path, and by all means you should follow that.”

Aaron Sorkin

“It seems to me that more and more we’ve come to expect less and less of each other, and that’s got to change. Your friends, your family, this school expect more of you than vocational success.”

Barack Obama

“I guarantee you, there will be times when friends or family urge you to pursue more sensible endeavors with more tangible rewards. And there will be times where you will be tempted to take their advice. But I hope you’ll remember, during those times of doubt and frustration, that there is nothing naïve about your impulse to change the world. Because all it takes is one act of service — one blow against injustice — to send forth what Robert Kennedy called that tiny ripple of hope. That’s what changes the world. That one act.”

Conan O’Brien

“For decades, in show business, the ultimate goal of every comedian was to host The Tonight Show. It was the Holy Grail, and like many people I thought that achieving that goal would define me as successful. But that is not true. No specific job or career goal defines me, and it should not define you. In 2000 — in 2000 — I told graduates to not be afraid to fail, and I still believe that. But today I tell you that whether you fear it or not, disappointment will come. The beauty is that through disappointment you can gain clarity, and with clarity comes conviction and true originality.”

And as a bonus…

Ray Bradbury

“I’ve never worked a day in my life. I’ve never worked a day in my life. The joy of writing has propelled me from day to day and year to year. I want you to envy me, my joy. Get out of here tonight and say: “Am I being joyful?” And if you’ve got a writer’s block, you can cure it this evening by stopping whatever you’re writing and doing something else. You picked the wrong subject.”