Wonder, and its expression in poetry and the arts, are among the most important things which seem to distinguish men from other animals, and intelligent and sensitive people from morons.
When you know both yourself as well as your competition, you are never in danger. To know yourself and not others, gives you half a chance of winning. Knowing neither yourself or your competition puts you in a position to lose.
I never could have done what I have done without the habits of punctuality, order, and diligence, without the determination to concentrate myself on one subject at a time.