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.
One only gets to the top rung on the ladder by steadily climbing up one at a time, and suddenly, all sorts of powers, all sorts of abilities which you thought never belonged to you - suddenly become within your own possibility and you think, 'Well, I'll have a go, too.'
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.