The way to know about championship quality is to learn from champions, and that I did; studying them with professional purpose during my time in the ring and from habitual interest afterward.
Exercise should be regarded as tribute to the heart.
Fat is one of the chief enemies of the heart because it has to be plentifully supplied with blood and thus needlessly increases the pumping load that the heart must sustain.
Handball, swimming, running, jumping, basketball, and boxing were as much a part of me as breathing.
I did six years of planning to win the championship from Jack Dempsey.
If all human lives depended upon their usefulness - as might be judged by certain standards - there would be a sudden and terrific mortality in the world.
In youth, we get plenty of exercise through games and running around, but as middle life approaches, we settle down, literally and figuratively.
My own ambition in the ring had always been skillful boxing, speed and defense - on the order of Mike Gibbons.
Never eat less than four hours before boxing. Then eat only lightly.
Normally, I could hit hard enough, as anyone who studied my fights might have known. But the impression was that I was essentially defensive, the very reverse of a killer, the prize fighter who read books, even Shakespeare.
Upon awakening in the morning, I wondered if the proceedings of the night before had been a dream. It was hard to believe that I was the world's heavyweight champion.
The man who has allowed his body to deteriorate cuts a pitiful figure - chest collapsed, stomach protruding.
Though I was not a belligerent kid, I do not think I ever passed up a good opportunity to fight.
To enjoy the glow of good health, you must exercise.
One half-conscious thought was burned in my mind: stay on your feet.