Mathematics for Children

By relieving the brain of all unnecessary work, a good notation sets it free to concentrate on more advanced problems, and in effect increases... mental power... Probably nothing in the modern world would have more astonished a Greek mathematician than to learn that, under the influence of compulsory education, the whole population of Western Europe, from the highest to the lowest, could perform the operation of division for the largest numbers. This fact would have seemed to him a sheer impossibility.

An arguing couple spiraling into negativity and teetering on the brink of divorce is actually mathematically equivalent to the beginning of a nuclear war.

A close watch must be kept on the children, and they must never be left alone anywhere, whether they are in ill or good health. This constant supervision should be exercised gently and with a certain trustfulness calculated to make them think that one loves them, and that it is only to enjoy their company that one is with them. This will make them love their supervision rather than fear it.