(From Think And Grow Rich by Napoleon Hill) Man’s brain may be compared to an electric battery. It is a well-known fact that a group of electric batteries will provide more energy than a single battery. It is also a well-known fact that an individual battery will provide energy in proportion to the number and capacity of the cells it contains.

The brain functions in a similar fashion. This accounts for the fact that some brains are more efficient than others, and leads to this significant statement - a group of brains coordinated (or connected) in a spirit of harmony will provide more thought-energy than a single brain, just as a group of electric batteries will provide more energy than a single battery.

Through this metaphor it becomes immediately obvious that the Master Mind principle holds the secret of the power wielded by men who surround themselves with other men of brains.

There follows, now, another statement which will lead still nearer to an understanding of the psychic phase of the Master Mind principle: When a group of individual brains are coordinated and function in harmony, the increased energy created through that alliance becomes available to every individual brain in the group.

It is a well-known fact that Henry Ford began his business career under the handicap of poverty, illiteracy, and ignorance. It is an equally well-known fact that, within the inconceivably short period of ten years, Mr. Ford mastered these three handicaps, and that within twenty-fie years he made himself one of the richest men in America. Connect with this fact the additional knowledge that Mr. Ford’s most rapid strides became noticeable from the time he became a personal friend of Thomas A. Edison, and you will begin to understand what the influence of one mind upon another can accomplish. Go a step farther, and consider the fact that Mr. Ford’s most outstanding achievements began from the time that he formed the acquaintances of Harvey Firestone, John Burroughs, and Luther Burbank, (each a man of great brain capacity) and you will have further evidence that power may be produced through friendly alliance of minds.

Men take on the nature and the habits and the power of thought of those with whom they associate in a spirit of sympathy and harmony. Through his association with Edison, Burbank, Burroughs and Firestone, Mr. Ford added to his own brain power the sum and substance of the intelligence, experience, knowledge, and spiritual forces of these four men….

Every man who manages a business knows what a difficult matter it is to get employees to work together in a spirit even remotely resembling harmony.

The list of the chief sources from which power may be attained is [as you have seen] headed by Infinite Intelligence. When two or more people coordinate in a spirit of harmony, and work toward a definite objective, they place themselves in a position, through that alliance, to absorb power directly from the great universal storehouse of power. It is the source to which the genius and every great leader turn (whether they may be conscious of the fact or not).