Fortune is asking 21 luminaries the best advice they ever got. One of them is Apple’s former Senior Vice President of Retail Ron Johnson:

-Ron Johnson (CEO of J.C. Penney) on leadership lessons from Apple and how he’s applying them to his new position: “I remember when Apple went through a tough period. I didn’t feel the pain as much as Steve [Jobs] did. When you are in the leadership position, the tough times can be much more difficult, because your job is really to shield your team through that, to keep them from taking shortcuts. We are building J.C. Penney for the next century. It’s not about the quarter or the year.”