Previously, there had been an obscure point in his knowledge of the world which had arisen through his omitting something in his early education, whether he had been either artificially educated by men or just naturally by his own experience. Therefore one should try to find out the strictly natural course of knowledge, so that by keeping methodically to it children may become acquainted with the affairs of the world, without getting false ideas into their heads, which frequently cannot be driven out again. In carrying this out, one must next take care that children do not use words with which they connect no clear meaning. Even children have, as a rule, that unhappy tendency of being satisfied with words instead of wishing to understand things, and of learning words by heart, so that they may make use of them when they are in a difficulty. This tendency clings to them afterwards, so that the knowledge of many learned men becomes mere verbosity. However, the principal thing must always be to let one's observations precede one's ideas, and not the reverse as is usually and unfortunately the case; which may be likened to a child coming into the world with its feet foremost, or a rhyme begun before thinking of its reason. While the child's mind has made a very few observations one inculcates it with ideas and opinions, which are, strictly speaking, prejudices. His observations and experience are developed through this ready-made apparatus instead of his ideas being developed out of his own observations. In viewing the world one sees many things from many sides, consequently this is not such a short or quick way of learning as that which makes use of abstract ideas, and quickly comes to a decision about everything; therefore preconceived ideas will not be rectified until late, or it may be they are never rectified. For, when a man's view contradicts his ideas, he will reject at the outset what it renders evident as one-sided, nay, he will deny it and shut his eyes to it, so that his preconceived ideas may remain unaffected. And so it happens that many men go through life full of oddities, caprices, fancies, and prejudices, until they finally become fixed ideas. He has never attempted to abstract fundamental ideas from his own observations and experience, because he has got everything ready-made from other people; and it is for this very reason that he and countless others are so insipid and shallow. Instead of such a system, the natural system of education should be employed in educating children. No idea should be impregnated but what has come through the medium of observations, or at any rate been verified by them. A child would have fewer ideas, but they would be well-grounded and correct. It would learn to measure things according to its own standard and not according to another's. It would then never acquire a thousand whims and prejudices which must be eradicated by the greater part of subsequent experience and education.