Most of us are average in many things because we have picked up our knowledge as we went along and have never studied fundamentals. This applies to sports as much as to public speaking. For example, one of my colleagues was a very fine tennis player. He became a National Champion and participated in many international matches. Why is it that to-day, although he hardly plays at all, he can take on most club players who have taught themselves, and usually beat them? His answer is, "Once you know the fundamentals of each stroke you may lose a game but you will never play really badly." If you...