“I never tried to prove anything to someone else. I wanted to prove something to myself.”
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Kobe Bryant 32
American basketball player 1978–2020Related quotes

from Astaire's autobiography Steps in Time, 1959, p. 325.

Announcing his retirement from the Bulls (1993-10-06) Classic NBA Quotes: Michael Jordan, 2006-11-24, NBA Encyclopedia, NBA Media Ventures http://www.nba.com/history/Classic_NBA_Quotes_Jordan.html,

“You can hire logic, in the shape of a lawyer, to prove anything that you want to prove.”
The Autocrat of the Breakfast Table (1858)

The Sunday Times, May 14, 2006
Drugs
Section 1.16
The Crosswicks Journal, A Circle of Quiet (1972)

Interview with Gazzetta dello Sport, 16 Feb. 2006 http://www.msnbc.msn.com/id/11385083/

“I can prove anything by statistics except the truth.”
As quoted in A Dictionary of Thoughts (1908) edited by Tryon Edwards, p. 587.