Max Schmeling from his autobiography by George Van Der Lippe: ”…From the very start of my career, it was clear to me that achievement was built on discipline. Accomplishment in sports demands the commitment of one’s entire self…morally, intellectually, and spiritually. Avoid alcohol, cigarettes, live life according to a stricter diet. A slight delay in reaction time, a letdown in exact timing, a deficient punch or the famous glass jaw can cost one a career despite all the sacrifice. In the ring and elsewhere, it’s intelligence that is the decisive factor. With tactics and strategy, even a less physically gifted boxer can outmaneuver a giant.”