“The only thing standing between you and your goal is the bullshit story you keep telling yourself as to why you can't achieve it.”
Jordan Belfort played by Leonardo DiCaprio in The Wolf of Wall Street (2013)
Related quotes

“That's bullshit. You're being deliberately unpleasant. I suppose you can't help yourself, can you?”
To then Shadow minister for Health Nicola Roxon after a debate before the Nation Press Gallery, subsequently quoted in http://www.smh.com.au/news/national/abbotts-day-from-hell/2007/10/31/1193618926551.html "Abbotts Day From Hell", Sydney Morning Herald, October 31, 2007
2007

Original from Zig Ziglar https://en.wikiquote.org/wiki/Zig_Ziglar
Misattributed
As quoted in Secrets of Superstar Speakers: Wisdom from the Greatest Motivators of Our Time (2000) by Lilly Walters, p. 96
Variant: What you get by achieving your goals is not as important as what you become by achieving your goals.

Attributed to Zig Ziglar
Misattributed

“If your only goal is to become rich, you will never achieve it.”
As quoted in Complete Speaker's and Toastmaster's Library (1992) edited by Jacob Morton Braude and Glenn Van Ekeren

On working in peace negotiations, as quoted in "Nobel Peace Prize winner wants jobs for the young" in International Herald Tribune (11 October 2008)
Context: You have to be rather straightforward with your clients. You can't tell the parties only nice things. This is not an entertainment show; it's not reality television either.

“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.