“I had fooled myself into thinking that I was something important to the rest of the world.”
Source: It's Kind of a Funny Story
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Ned Vizzini 81
American writer 1981–2013Related quotes

“The next time I send a damn fool for something, I go myself.”
Reported in Paul F. Boller, John George, They Never Said It (1990), p. 41-42.
Misattributed

As quoted in "Kim Hye-ja returns to stage with 'Doubt'" in Han Cinema (20 November 2006) https://www.hancinema.net/herald-interviewkim-hye-ja-returns-to-stage-with-doubt--7779.html

“I don't believe Fermat had a proof. I think he fooled himself into thinking he had a proof.”
Nova Interview
Source: The Time Axis (1949), Ch. 2 : The Stain and the Stone

“I do not live for what the world thinks of me, but for what I think of myself.”
Letter to Charles Warren Stoddard (21 August 1903)

“What do you think about me is not my business the important thing is what I think about myself…”
Source: Rich Dad's Cashflow Quadrant: Rich Dad's Guide to Financial Freedom