I’m going to share a little secret with you. Running has always been a source of my stamina. Early in my career I learned to run until I was tired, then run even more after that. But all the running I did before the fatigue and pain was just the introduction to my workout. The real conditioning began when the pain set in. That was when if was time to start pushing. That was when I would count every mile as extra strength and stamina.
What counts in the ring is what you can do after you’re exhausted. The same is true of life.
Outrun the people who quit when they feel discomfort, outrun the people who stop because of despair, outrun the people who are delayed because of prejudice, outrun the people who surrender to failure, and outrun the opponent who loses sight of the goal. Because if you want to win, the will can never retire, the race can never stop, and faith can never weaken.
My heart told me one thing and my mind told me another. And when I had to decide between them, I chose to follow my heart.
From "The Soul of a Butterfly"
by Muhammad Ali with Hana Yasmeen Ali