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Seeking to explain and control the world of unknown

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Unformatted text preview: g," for there is in touch, and especially in touch of the hands and in the arm movements, a Reality component of the first magnitude. But not only in touching and investigating, but in pushing and pulling and striking, IN CAUSING CHANGE, does the hand become the symbol and source of power and efficiency. Undoubtedly this phase of the hands' activities remained predominant for untold centuries, during which man made but slow progress in his career toward the leadership of the world. Then came the phase of tool-making and using and with that a rush of events that built the cities, bridged the waters, opened up the Little and the Big as sources of knowledge and energy for man and gave him the power which he has used,--but poorly. It is the skill of human hands upon which the mind of man depends; though we fly through the air and speed under water, some one has made the tools that made the machine we use. Therefore, the mechanical skill of man, the capacity to shape resisting material to purpose, the power of the detailed applications of the principles of movement and force are high, special functions of the intelligence. That people differ enormously in this skill, that it is not necessarily associated with other phases of intelligence are commonplaces. The dealer in abstract ideas of great value to the race may be unable to drive a nail straight, while the man who can build the most intricate mechanism out of crude iron, wood and metal may be unable to express any but the commonplaces of existence. Intelligence, acting through skill, has evolved machinery and the industrial evolution; acting to discover constant principles operating in experience, it has established science. Seeking to explain and control the world of unknown forces, it has evolved theory and practice. A very essential division of people is on the one hand those whose effort is to explain things, and who are called theorists, and those who seek to control things, the practical persons. There is a constant duel between these two types of personalities...
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