The most important thing in terms of your circle of competence is not how large the area of it is, but how well you've defined the perimeter.
Warren BuffettThe best investment you can make, is an investment in yourself... The more you learn, the more you'll earn.
Warren BuffettWhen we really sit back with a smile on our face is when we run into a situation we can understand, where the facts are ascertainable and clear, and the course of action obvious.
Warren Buffett