"Controlled Attention leads to mastery in any type of human endeavor, because it enables one to focus the powers of his mind upon the attainment of a definite objective and to keep it so directed at will. Great achievements come from minds that are at peace with themselves. Peace within one’s mind is not a matter of luck, but is a priceless possession, which can be attained only by Self-Discipline based upon Controlled Attention. Concentration on one’s major purpose projects a clear picture of that purpose upon the conscious mind and holds it there until it is taken over by the subconscious mind and acted upon."