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 shoes at once, and took them up one by one in turn, only to lay them aside in a few minutes; or as if a baker, who wished to place various kinds of bread in his oven, were to take them out again immediately, removing one kind as he put in another. Who would commit such an act of folly? The shoemaker finishes one shoe before he begins another. The baker places no fresh bread in the oven until that already in it is thoroughly baked.

31. Rectification.—Let us imitate these people and take care not to confuse scholars who are learning grammar by teaching them dialectic, or oducing rhetoric into their studies. We should also put off the study of Greek until Latin is mastered, since it is impossible to concentrate the mind on any one thing, when it has to busy litself with several things at once.

That great man, Joseph Scaliger, was well aware of this. It is related of him that (perhaps on the advice of his father) he never occupied himself with more than one branch of knowledge at once, and concentrated all his energies on that one. It was owing to this that he was able to master not only fourteen languages, but also all the arts and sciences that lie within the province of man. He devoted himself to these one after the other with such success that in each subject his learning excelled that of men who had given their whole lives to it. And those who have tried to follow in his footsteps and imitate his method, have done so with considerable success.

32. Schools, therefore, should be organised in such a manner that the scholar shall be occupied with only one object of study at any given time. {{dhr|0.5em{{ {{c|{{sc|Fifth Principle}}}}

33. In all the operations of nature development is from within.

For example in the case of a bird it is not the claws, or the feathers, or the skin that are first formed, but the inner parts; the outer parts are formed later, at the proper season. {{nop}}