The man who thinks for himself learns the authorities for his opinions only later on, when they serve merely to strengthen both them and himself; while the book-philosopher starts from the authorities and other people's opinions, therefrom constructing a whole for himself; so that he resembles an automaton, whose composition we do not understand. The other man, the man who thinks for himself, on the other hand, is like a living man as made by nature. His mind is impregnated from without, which then bears and brings forth its child. Truth that has been merely learned adheres to us like an artificial limb, a false tooth, a waxen nose, or at best like one made out of another's flesh; truth which is acquired by thinking for oneself is like a natural member: it alone really belongs to us. Here we touch upon the difference between the thinking man and the mere man of learning. Therefore the intellectual acquirements of the man who thinks for himself are like a fine painting that stands out full of life, that has its light and shade correct, the tone sustained, and perfect harmony of colour. The intellectual attainments of the merely learned man, on the contrary, resemble a big palette covered with every colour, at most systematically arranged, but without harmony, relation, and meaning. * * * * * _Reading_ is thinking with some one else's head instead of one's own. But to think for oneself is to endeavour to develop a coherent whole, a system, even if it is not a strictly complete one. Nothing is more harmful than, by dint of continual reading, to strengthen the current of other people's thoughts. These thoughts, springing from different minds, belonging to different systems, bearing different colours, never flow together of themselves into a unity of thought, knowledge, insight, or conviction, but rather cram the head with a Babylonian confusion of tongues; consequently the mind becomes overcharged with them and is deprived of all clear insight and almost disorganised. This condition of things may often be discerned in many men of learning, and it makes them inferior in sound understanding, correct judgment, and practical tact to many illiterate men, who, by the aid of experience, conversation, and a little reading, have acquired a little knowledge from without, and made it always subordinate to and incorporated it with their own thoughts.