3) This quote represents the Extrovert Ideal talked about in Part I of Quiet. Dale Carnegie is used to illustrate the first figure to promote the idea of being an extrovert. He started as a farm boy who wasn't a great speaker and transformed into a charismatic leader. The quote here follows this idea that the only way to make a difference is to be talking to others and sharing your ideas verses thinking about different solutions and expressing them in a less public way.
Don't be afraid to give your best to what seemingly are small jobs. Every time you conquer one it makes you that much stronger. If you do the little jobs well, the big ones will tend to take care of themselves