ugh, I can't stand this. 1. No, it will not necessarily happen. You can focus on one thing and still fail. See the story about the guy who dropped everything to try and be a professional golfer. 2. When you spend 20 years of your life doing that one thing, you'd better succeed because if not, it means you failed everything . 3. You need to define success. Being awesome at one thing is not for everyone. Steve Jobs' la…
I think a citation is required for point #3. As I understand it, Steve Jobs' last words were "Oh wow. Oh wow. Oh wow." The best-at-business quote is fake: http://www.snopes.com/steve-jobs-deathbed-speech/
“I wanted my kids to know me,” Mr Isaacson recalled Mr Jobs saying, in a posthumous tribute the biographer wrote for Time magazine. “I wasn’t always there for them, and I wanted them to know why and to understand what I did.”
“He was very human. He was so much more of a real person than most people know. That’s what made him so great,” he added. “Steve made choices. I asked him if he was glad that he had kids, and he said, ‘It’s 10,000 times better than anything I’ve ever done’.”