Will

"The concentration of the will and the striving in one direction - this is the condition for the success of all work. The more united this will, the more straightforwardly and the more earnestly it strives to accomplish something, the more significant and the more excellent its work. For example, someone wants to know English. If he sets out and his every thought from morning till night is English, he translates and takes notes, reads grammar books, groups words, mumbles English words as he walks, after two months he is reading English books without a dictionary. But if he starts thinking about French the next day, then German the week after, puts one down, picks up another, remembers to paint something, or gets a sheet of music, goes out to play cards, then learns English again, well, he'll know in 10 years."