The Times Magazine interview (2005)
Context: I could have been more famous if I did all the glitzy things, but celebrity always seemed so unnecessary... Fame and success are very different things, anyway. The music sold itself before anybody knew who I was, so I felt I had a choice. I told the record company I didn't feel the need to be out there at red-carpet events. I wanted a career. But I wanted to keep myself intact as a person.
“I’ve always believed that the real measure of celebrity success is not just how famous he becomes, but what he does with that fame and fortune.”
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Michael Jackson 110
American singer, songwriter and dancer 1958–2009Related quotes

“Fame for me is not external, it’s internal. So I’ve been famous for a long time.”

“Celebrities are invariably celebrity-mad, just as liars always believe liars.”
Source: 1990s, Palimpsest : A Memoir (1995), Ch. 18: To Do Well What Should Not Be Done at All, p. 311

Letter to his son, Kermit, quoted in Theodore Roosevelt by Joseph Bucklin Bishop http://www.trsite.org/content/pages/speaking-loudly (1915)
1910s

“The measure of a man's real character is what he would do if he knew he would never be found out.”
citation needed
The earliest quotations of this give it as anonymous or unknown author. https://books.google.com/books?id=hPIsAAAAYAAJ&pg=PA321&dq=%22what+he+would+do+if+he+knew+it+would+never+be+found+out%22&hl=en&sa=X&ved=0CBwQ6AEwAGoVChMIlvi0prz_xwIVTwaSCh0hVwX5#v=onepage&q=%22what%20he%20would%20do%20if%20he%20knew%20it%20would%20never%20be%20found%20out%22&f=false https://books.google.com/books?id=i2MPAQAAIAAJ&pg=PA16-IA71&dq=%22what+he+would+do+if+he+knew+it+would+never+be+found+out%22&hl=en&sa=X&ved=0CB0Q6AEwAGoVChMIkMmp8rz_xwIV1BGSCh25lAO0#v=onepage&q=%22what%20he%20would%20do%20if%20he%20knew%20it%20would%20never%20be%20found%20out%22&f=false
Attributed

“Success doesn't change you; fame does.”
https://www.youtube.com/watch?v=IPItgCnamNg