How Warren Buffett learned the meaning of success by Patricia Sellers @FortuneMagazine May 7, 2013, 5:08 PM EST E-mail Tweet Facebook Google Plus Linkedin Share icons Last week’s interview with Warren Buffett on Women and Work featured a lot of memorable moments. The legendary investor’s first Tweet — the Tweet heard around the world — was just one. The most special moment for me, Buffett’s interviewer, came when he answered this question from a University of Nebraska student: How do you define success? “If people whom you want to have love you love you, you’re a success,” said the Berkshire Hathaway chairman and CEO. You wouldn’t expect this answer from the guy who built America’s 5th largest company (according to the just-released Fortune 500) practically from scratch. In the interview, Buffett went on to explain that he learned the meaning of success from a late friend named Bella Eisenberg, a resident of his hometown, Omaha, and an Auschwitz survivor. Eisenberg once told Buffett that she was slow to make friends because whenever she met people, she thought to herself: “Would they hide me?” Here’s more from Buffett, 82, on his friend’s impact on the way he thinks about success: You can watch the full Buffett interview on Women and Work here. And check out my Fortune colleague Carol Loomis’ story about nine new signers of The Giving Pledge, which is Buffett’s and Bill and Melinda Gates’ philanthropic program to encourage billionaires to donate their money during their lifetimes. Among the just-announced joiners: Spanx founder Sara Blakely, 42, whose Giving Pledge Loomis details here.