Study the past if you would define the future. I am not one who was born in the possession of knowledge; I am one who is fond of antiquity, and earnest in seeking it there. Learning without thought is labor lost; thought without learning is perilous.
... knowledge must continually be renewed by ceaseless effort, if it is not to be lost. It resembles a statue of marble which stands in the desert and is continually threatened with burial by the shifting sand. The hands of service must ever be at work, in order that the marble continue to lastingly shine in the sun. To these serving hands mine shall also belong.
Therefore only through education does one come to be dissatisfied with his own knowledge, and only through teaching others does one come to realize the uncomfortable inadequacy of his knowledge. Being dissatisfied with his own knowledge, one then realizes that the trouble lies with himself, and realizing the uncomfortable inadequacy of his knowledger.
THE TEACHER AS A NECESSARY EVIL. Let us have as few people as possible between the productive minds and the hungry and recipient minds! The middlemen almost unconsciously adulterate the food which they supply. It is because of teachers that so little is learned, and that so badly.
There are two ways of dealing with nonsense in this world. One way is to put nonsense in the right place; as when people put nonsense into nursery rhymes. The other is to put nonsense in the wrong place; as when they put it into educational addresses, psychological criticisms, and complaints against nursery rhymes or other normal amusements of mankind.