A person who doubts himself is like a man who would enlist in the ranks of his enemies and bear arms agains himself. He makes his failure certain by himself being the first person to be convinced of it.
The power of the human will to compete and the drive to excel beyond the body's normal capabilities is most beautifully demonstrated in the arena of sport.
There's no committee that says, 'This is the type of person who can change the world - and you can't.' Realizing that anyone can do it is the first step. The next step is figuring out how you're going to do it.
Success in your work, the finding a better method, the better understanding that insures the better performing is hat and coat, is food and wine, is fire and horse and health and holiday. At least, I find that any success in my work has the effect on my spirits of all these.