The only way we could remember would be by constant re-reading, for knowledge unused tends to drop out of mind. Knowledge used does not need to be re… - Henry Hazlitt

There will not be a “surplus” of capital until the most backward country is as well equipped technologically as the most advanced, until the most inefficient factory in America is brought abreast of the factory with the latest and finest equipment, and until the most modern tools of production have reached a point where human ingenuity is at a dead end, and can improve them no further. As long as any of these conditions remains unfulfilled, there will be indefinite room for more capital.

The dilemma is this. In the modern world knowledge has been growing so fast and so enormously, in almost every field, that the probabilities are immensely against anybody, no matter how innately clever, being able to make a contribution in any one field unless he devotes all his time to it for years. If he tries to be the Rounded Universal Man, like Leonardo da Vinci, or to take all knowledge for his province, like Francis Bacon, he is most likely to become a mere dilettante and dabbler. But if he becomes too specialized, he is apt to become narrow and lopsided, ignorant on every subject but his own, and perhaps dull and sterile even on that because he lacks perspective and vision and has missed the cross-fertilization of ideas that can come from knowing something of other subjects.

Today is already the tomorrow which the bad economist yesterday urged us to ignore.