“Before you say you can't do something, try it.”
Attributed to Sakichi and Kiichiro Toyoda in: Emi Osono, Norihiko Shimizu, Hirotaka Takeuchi (2008), Extreme Toyota: Radical Contradictions That Drive Success at the World's Best Manufacturer. p. 86
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Kiichiro Toyoda 5
Japanese businessman 1894–1952Related quotes
“Before you hate something you should try to understand it.”
Source: Dakota

“If you can't do something smart, do something right.”
Source: Serenity

Source: Anger: Wisdom for Cooling the Flames

As quoted in "Salma Hayek's Condom Campaign" at femalefirst.co.uk http://www.femalefirst.co.uk/health/3382004.htm
Context: Before you do anything, think. If you do something to try and impress someone, to be loved, accepted or even to get someone's attention, stop and think. So many people are busy trying to create an image, they die in the process. Sleeping with the wrong person is one thing, but not using a condom because you want to please someone, or because you're in a romantic bubble, is another. … I wish we weren't so busy trying to impress people.

“Government can't do anything for you except in proportion as it can do something to you.”
As quoted in "Broken Government: Where the right went wrong," CNN (2006-11-03).

“When people keep telling you that you can't do a thing, you kind of like to try it.”
Margaret Chase Smith, quoted in More Than Petticoats : Remarkable Maine Women (2005) by Kate Kennedy
Misattributed

“When people keep telling you that you can't do a thing, you kind of like to try it.”
As quoted in "Nation: Madam Candidate" in TIME magazine (7 February 1964) http://www.time.com/time/magazine/article/0,9171,870656-2,00.html
Misattributed
Context: I am running against no one. I'd like to be President. I think my experience and my record are greater than any other candidate or any other of the unannounced candidates. It's a real challenge, and that's one of the paramount things. When people keep telling you that you can't do a thing, you kind of like to try it.