Death often calls for reflection, and in the case of George Michael, who passed away over the weekend , many are looking to the past to appreciate his life and the music he created. One especially touching memory is this open letter Frank Sinatra wrote to the musician after reading an interview in the LA Times, Mashable reports . It's filled with advice about fame and life, and it's especially poignant to read now.Back in 1990, just after his second album Listen Without Prejudice Vol. 1 hit stores, Michael declared to the LA Times that he was swearing off fame. "I decided that the thing I really enjoy...the thing I really needed was my songwriting," he said. "I didn't need the celebrity."In fact, he found himself crumbling under the pressure, but there was one person who had something to say about it. "Swing, man," Frank Sinatra instructed in an open letter written in response to the interview. It's just been rediscovered on Twitter, and people can't stop sharing it.